50 POINTS find the length of ab plz help me

Answer:

1.22 s

Step-by-step explanation:

h = -810t² + 1980t

This is the equation of a parabola.

We must solve the equation to find the maximum height (h).

The coefficient of x² is negative, so the parabola opens downward, and the vertex is a maximum.

One way to solve this problem is to convert the equation to the vertex form.

We do that by completing the square.

Calculation:

h = -810t² + 1980t

Divide both sides by -810 to make the coefficient of  t² equal to 1.

(-1/810)h = t² - (22/9)t

Square half the coefficient of t

(-11/9)² = 121/81

Add and subtract it on the right-hand side

(-1/810)h = t² - (22/9)t  + 121/81 - 121/81  

Write the first three terms as the square of a binomial

(-1/810)h = (t - ¹¹/₉)² -121/81

Multiply both sides by -810

h = -810(t - ¹¹/₉)² + 1210

You have converted your equation to the vertex form of a parabola:

y = a(t - h)² + k = 0,

where (h, k) is the vertex.

h = ¹¹/₉ and k = 1210, so the vertex is at (¹¹/₉, 2100).

The maximum height of the rocket is 2100 cm.

After ¹¹/₉ s ≈ 1.22 s, the rocket will have reached a height of 1210 cm.

The graph below shows the rocket reaching 1210 cm at 1.22 s.

Answer:

1) The worker can keep the soup in a container with a large surface area as evaporation will occur faster

2) The worker and keep the soup near a fan, cooling the soup

3) The worker keep the soup in a dry area as moisture reduces the rate of evaporation

Answer:

y=5

Step-by-step explanation:

1. Is a set if 5 horizontal lines and four spaces that each represent a diff musical pitch.

2. Temp is the speed at which a passage of music is or should be played.

3. A note have the time value of two minims or four crotchets, represented by a ring with no stem.

4. C, D, E, F, G, A, and B

5. Bass clefs

6. Is a system where very note of a scale is given its own unique syllabe, which is used to sing that note every time it appears. The words that are making Solfege are: Do, Re, Mi, Fa, Sol, La, Ti, and Do.

7. The time signature is a national convention use in Western musical notation to specify how many beats (pulses) are contained in each measure, and which note value is equivalent to a beat.

Look at the attached picture

Hope it will help you

Good luck on your assignment

Answer:

First answer, F(x) = Cuberoot (x+6) + 1

Step-by-step explanation:

Graphing Calculator

Hope this helps!

Answer:

It is going to be 16 ft because

26 ft - 10 ft = 16 ft

can u mark me brainliest plz

Answer:

the top of the ladder is at 24 feet from the ground

Step-by-step explanation:

Use the Pythagorean theorem to solve for the unknown, since we notice that the ladder is the hypotenuse of a right angle triangle formed by the horizontal distance from the wall to the base of the ladder, and the height of the top of the ladder against the wall. We need to find one of the triangle's sides given its hypotenuse and the other side, so we use the formula:

[tex]side_2=\sqrt{hyp^2-side_1^2}\\ side_2=\sqrt{26^2-10^2} \\side_2=\sqrt{676-100} \\side_2=\sqrt{576} \\side_2=24\,\,ft[/tex]

Answer:

You can use the Law of Sines for this problem, but what makes it tough at first glance is that they put a step in before you can use it directly. That first step is to get m∠C. When solving a triangle, always get the third angle if you know the other two so that you can use the Law of Sines (or Law of Cosines) more directly.

The sum of the angles of any triangles is 180°. We know the measures of the two other angles. So we subtract them from 180° to find that third angle.

180° - 76° - 66° = 38°

Now we can use the proportion from the picture. Angle B measures 76°, side b is our unknown, Angle C measures 38°, and side c measures 3 units.

sin 76° sin 38°

----------- = -----------

b 3

Cross multiply to find b (the side). We carry out five places in these calculations to get more accuracy.

3 * sin 76° = b * sin 38°

b = 3 * sin 76° 3 * 0.56611 1.69832

--------------- = --------------- = ---------------- = 5.73044

sin 38° 0.29636 0.29636

To the nearest tenth, b - 5.7 units.

Step-by-step explanation:

google hope this helps

Answer:

Step-by-step explanation:

Answer:3888

Step-by-step explanation:

(6^4)3

=1296*3=3888

Hope I helped

15.A

16.D

17.B

Step-by-step explanation:

if you put it on a graph it works for all

Answer:

Hey mate,

In one hour = 2/3/1/5

= 10/3 lawn

Hope this helps you out!

Step-by-step explanation:

Answer:

10/3

Step-by-step explanation:

Answer:

f(x) has 3 real roots

Step-by-step explanation:

According to the Fundamental theorem of Algebra.

A polynomial of degree n has n roots, which can be real or complex or both.

Thus a polynomial of degree 3 has 3 roots.

Two real roots are given

Complex roots occur in conjugate pairs, thus there cannot be an odd number of complex roots.

Thus f(x) has three real roots.

Answer:

B

Step-by-step explanation:

Edge

Answer:

$0.30

Step-by-step explanation:

3.68*.0825= .3036

The equations that represent the relationship between the measure of the angles in the figure are:

D. a+b=180

E. 180-a=b

The measure of the angle of a straight line is 180 degrees.

In the given figure, KL is a straight line segment.

This means that the measurement of the angles of KL is 180 degrees.

This implies that,

[tex]a^{\circ}+b^{\circ}=180^{\circ}\\[/tex]

Or

[tex]180^{\circ}-a^{\circ}=b^{\circ}[/tex]

So, the equations will be:

D. a+b=180

E. 180-a=b

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Answer:

265.68

Step-by-step explanation:

ok so the area for the rectangle is 228

the area for the circle is 37.68

you add them together to get your answer

hope this helps

The correct answer should be A.

First consider that 2357/1180 is around 2. So the first part must have the answer of times 2. Then decide how many zeroes must be added. By simple math if you do 118,000,000,000 * 20 (which is ) then you get 2,360,000,000,000. which is roughly the correct number.

The correct answer should be A.

First, consider that 2357/1180 is around 2.

Estimation is the process of finding the number which is close enough to the exact solution. But it is not an exact answer.

So the first part must have the answer of times 2.

Then decide how many zeroes must be added. By simple math if you do 118,000,000,000 * 20.

Then you get 2,360,000,000,000.

which is roughly the correct number.

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Answer:

$1.98

Step-by-step explanation:

125.89 x 0.0157 = 1.97 rounded to 1.98

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Answer:

6x²+11x-3

Step-by-step explanation:

5x²+2x+x²+9x-3=

6x²+11x-3

You can't put the x² and x together since you don't know what x is.

Add terms that have only x together and terms that only have x² together and terms that have neither x or x²

5x to the second power with x to the second power

2x with 9x

3 is by its self

Answer:

h(r) = 6(r+1)+10

Step-by-step explanation:

Just solve for q. Because that's the output. h(r) = q

Answer: 6r+16

Step-by-step explanation: All you need to do is to simplify the equation q-10=6(r+1) It becomes q-10=6r+6. You then add 10 on both sides, resulting q=6r+16.

Answer:

A.

Step-by-step explanation:

All terms are even. This means it either has to be A. or B. Since 24 is an even number, two even numbers are always added together. So A. is the correct answer.

Answer:

A.

any number even + even = even

10 + 14 = 24 and 24 is even

12+24=36 which is even

Odd + odd does = even but it doesn't represent the situation so it is wrong.

Step-by-step explanation:

Answer: 3(1/2 + 2 1/2) = 3(1/2+5/2) = 3(6/2) = 3*3 = 9

Step-by-step explanation:

Step-by-step explanation:

[tex]3(a+b)[/tex]

Since we know that a equals -1/2 and b equals 2 1/2, then we can plug in the values into the equation.

[tex]3(-\frac{1}{2} +2 \frac{1}{2} )[/tex]

First, solve everything in the parentheses.

[tex]3(2)[/tex]

Now, multiply 3 by 2.

[tex]3*2=6[/tex]

So, your answer will be 6.

Answer:

8000 feet

Step-by-step explanation:

Assuming that the cable is a straight line,

it has to travel the the 80-fold of what it already did, and goes up the 80-fold.

Proofing this by calculating it could be done like this: 100 * (12.000/150)

= 100 * 80

(would really, reallly appreciate the brainliest)

Answer:

8,000

Step-by-step explanation:

Answer:

$45 for the cost and 9 for the perimeter.

Step-by-step explanation:

hope it helps you !!

Answer: perimeter is 96 ft

and it will cost 160

Step-by-step explanation:

Answer:

Step-by-step explanation:

rule for line c: y=x+3

x  y

0  3

1  4

2  5

3   6

I was able to determine the rule because line c has a slope (m) of 1 (it goes up one and sideways one each time). Its y int. is at 3, so that means 3 is b in the equation y= mx+b

Rule for line D: y=1/2x

x y

0 0

2 1

4 2

6 3

Line d is y=1/2x becaise it goes up 1 and then sidewys 2, so slope (m)= 1/2. There is no b becase it crosses the origin.

(-2,-1) (-4,-2) (-6, -3) just extend the line with a ruler.

hope this helps! :)

Answer:

84 ft

Step-by-step explanation:

triangle= 1/2bh

rectangle or square = bh

so 1/2(4)3=6

6 times 3= 18

1/2(4)3= 6

4 times 6 = 24

5 times 6 = 30

now you add them all up

6 + 18 + 6+ 24+ 30 =

The Surface area of this wedge is 84 square ft.

The area is the area occupied by a two-dimensional flat surface. It has a square unit of measurement. The surface area of a three-dimensional object is the space taken up by its outer surface. Square units are used to measure it as well.

For each three-dimensional geometrical shape, surface area and volume are determined. The area or region that an object's surface occupies is known as its surface area.

To find the Surface are we will find the area of each part individually.

We have two triangle and 3 rectangles.

So, area of Triangle

= 1/2 b h

= 1/2 x 4 x3

= 6 square ft

Area of rectangle

= l w

= 6 x 3

= 18 square ft

Area of 2 rectangle

= l w

= 4  x 6

= 24 square ft

and, area of 3rd rectangle

= 5 x 6

= 30 square ft

So, the Surface area of Figure is

= 6 + 18 + 6 + 24 + 30

= 84 square ft

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Answer:

2x + 3y = 46

3x + 5y = 74

Multiply 1st equation by 3 and 2nd equation by 2:

6x + 9y = 138

6x + 10y = 148

Subtract 2nd equation to 1st equation:

=> y = 148 - 138 = 10

=> 2x + 3*10 = 46

=> 2x = 16

=> x = 8

Hope this helps!

:)

Answer:

A

Step-by-step explanation:

Answer:

It's A.

Step-by-step explanation:

Answer:

71.1%

Step-by-step explanation:

Answer:

337.5

Step-by-step explanation:

450 - 25% × 450 =

(1 - 25%) × 450 =

(100% - 25%) × 450 =

75% × 450 =

75 ÷ 100 × 450 =

75 × 450 ÷ 100 =

33,750 ÷ 100 =

so the correct answer would be, 337.5