Please help quickly!

Answer:

t=1.58 seconds

Explanation:

The equation which models the height h of the seashell above water after t seconds

Height of seashell above water after t seconds; h = 40 - 8t²

Time that seashell is in air; t = 1.58 s

The sea shell is dropped under gravity and thus, from Newton's equations of motion, we know that height/distance is;

S = ut + ½gt²

Since it was dropped from a height and not the ground, then;

h = height of shell from ground

h_o = height from which the shell was dropped.

Thus, we have;

h - h_o = ut + ½gt²

We are told that the seashell was dropped into the ocean from a height of 40 ft. Thus;

h_o = 40 ft

It was dropped from rest and so; u = 0 ft/s

Acceleration due to gravity is; g = -32ft/s² (since it is free fall)

Thus;

h - 40 = 0(t) + ½(-32t²)

h = 40 - 8t²

The time that the seashell in the air will be after it has hit the surface which will be when h = 0.

Thus;

0 = 40 - 16t²

16t² = 40

t² = 40/16

t² = 2.5

t = √2.5

t = 1.58 s

Read more at; brainly.com/question/17576926

Answer:

Step-by-step explanation:

D

Answer:

20/7 or 2 and 6/7

Step-by-step explanation:

This equation works out to 2/1 • 10/7, which we can easily see equals 20/7, or 2 and 6/7, by multiplying the numerators and denominators.

Answer:

9

Step-by-step explanation:

180÷20=9.

Could I please have BRAINLIEST?

Answer:

I think its 11x/10

Step-by-step explanation:

Answer:

If you wanna know how many beats are in a full minute, the answer is 156 beats

Step-by-step explanation:

1/6*6=1

26*6=156

Answer:

$23.63

Step-by-step explanation:

Your just adding decimals if I understood the question. So basically you just multiply 6.95 by 3 which gets you 20.85.

And then you divide 6.95 by 10 which is .695, and then multiply that by 4 which gets you to 2.78.

So now you just add those two up

20.85 + 2.78 = 23.63

Your welcome :)

Yours truly, Madison Estrella

Answer:

Company B

Step-by-step explanation:

Given. That :

Company A:

Initial charge = $215

Charge per square foot = 0.50

Company B:

Initial charge = $100

Charge per square foot = 0.75

Which company if installing 400 square feet of carpet :

Company A:

Total bill:

$215 + 0.50(400) =$415

Company B:

Total bill:

$100 + 0.75(400) = $400

Hence, Company B will be a better option as the total cost is cheaper than company As cost.

Answer:

−2<x<4

Step-by-step explanation:

Answer:

i got this on edg its b

Step-by-step explanation:

Answer:

I get 92 but not really sire

Answer:

C 12 is the best estimate

Step-by-step explanation:

Answer:

d

Step-by-step explanation:

Answer:

I rlly don't know how to help you bruh

Step-by-step explanation:

Why I can't understand the question and as to what they mean by if you fold it as shown though i know they probably mean where the shapes on the side are I say find someone else or take a wild guess.

Answer:

it is false

Step-by-step explanation:

Answer: 2:D     3: 1/3 of the fruit, or 80 oranges

Step-by-step explanation:

Answer:

Step-by-step explanation: 5x105.2=526 75% of 105.2 is 78.9 so 105.2+78.9=184.1

Answer:

x = 11/c

Step-by-step explanation:

cx - 4 = 7

Add 4 to each side

cx - 4+4 = 7+4

cx = 11

Divide each side by c

cx/c = 11/c

x = 11/c

Answer:

I think that the answer is D

Step-by-step explanation:

Answer:

the answer is b between 6 and 7

Step-by-step explanation:

i say this because the square root of 41 is 6.4031.

6.4031 is in between 6 and 7.

hope this helps :)

Answer:

110.9 cm²

Step-by-step explanation:

The area (A) of an equilateral triangle is calculated as

A = [tex]\frac{s^2\sqrt{3} }{4}[/tex]  ( s is the side length )

Here s = 16, thus

A = [tex]\frac{16^2\sqrt{3} }{4}[/tex]

   = [tex]\frac{256\sqrt{3} }{4}[/tex] = 64[tex]\sqrt{3}[/tex] ≈ 110.9 cm² ( to 1 dec. place )

Answer: $10,800.00

Step-by-step explanation: 10,000 times 1%= 100

100 dollars she gains for twelve months

100 divide by 12 months equals $8.33

She would have a total of $10,800.00

Answer:

n+(n+2)+(n+4)=15

Step-by-step explanation:

Let n= the smallest odd integer

n+(n+2)+(n+4)=15

n=3

Step-by-step explanation:

Answer:

40 exhibits

Step-by-step explanation:

First, we will what we have gotten into fractions.

There are 38 reptile exhibits, but we dont know how much exhibits there is total, so we will make the total x: 38/x

We know that a percent is out of 100, so our fraction for the percent is 95/100

Now we are going to cross multiply 38/x and 95/100

38 * 100 = 3800

x * 95 = 95x, so 3800 = 95x

Divide both sides by 95 and you get 40.

Please mark brainliest, thank you!!

Answer:

The first one is A

The second one is B

Answer:

-28

Step-by-step explanation:

6 2/3*-4 1/5=

20/3*-21/5=

4/3*-21/1=

4/1*-7/1=

-28

Answer: Probability of a student playing both basketball and baseball is 4/28 or 14.3%

Step-by-step explanation:

1) Students playing atleast one sport = 28 - 6 = 22

2) N(Basketball ∩ Baseball) = N(Basketball) + N(Baseball) - N (Basketball U Baseball)

N(Basketball ∩ Baseball) = 9 + 17 - 22 = 4

3) Number of students playing both basketball and baseball = 4

Total number of students = 28

Probability of a student playing both basketball and baseball is 4/28

4/28= 0.1428571429 x 100%= 14.3%

Answer:4/28

Step-by-step explanation:4/28

Answer:

A′B′ and AB are equal in length.

Step-by-step explanation:

Given that the location of the points are at A(1, 3) and B(5, 3).

Transformation is the movement of a point from its initial location to a new location. Types of transformation are reflection, rotation, translation and dilation.

Rigid transformation are transformation that preserves the shape and size when performed. Types of rigid transformation are reflection, rotation, translation.

Hence if AB is rotated 270 degrees counterclockwise about the origin to form A′B′, both A′B′ and AB are equal in length because rotation is a rigid transformation.

If A(x,y) is rotated 270 degrees counterclockwise about the origin, it becomes A'(y,-x).

Hence if AB is rotated 270 degrees counterclockwise about the origin to form A'(3, -1), B'(3, -5)

[tex]AB=\sqrt{(5-1)^2+(3-3)^2} =4\\\\A'B'=\sqrt{(3-3)^2+(-5-(-1))^2}=4,[/tex]

Answer:

[tex]\frac{3}{5}[/tex]

Step-by-step explanation:

[tex]\frac{3}{4}[/tex] of [tex]\frac{4}{5}[/tex]

"of" translates to a multiplication symbol in math.

So it's asking for: [tex]\frac{3}{4}[/tex] x [tex]\frac{4}{5}[/tex]

You could cross out both fours getting to the answer of [tex]\frac{3}{5}[/tex]