3 years ago

If a population is

Mathematics

1 answer:

Kazeer [188]3 years ago

7 0

Answer:

D would be the answer Nonth grades at peak school

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3 years ago

If an object takes 7 second to fall to the ground, what was its initial height? Show your work.

Verdich [7]

Answer:240.1 m

Step-by-step explanation:

We are given the following equation that models the the time it takes to an object to fall to the ground:

$t_{(H)}=\sqrt{\frac{2H}{g}}$

Where:

$t_{(H)}=7 s$ is the time it takes to the object to fall to the ground

$H$ is the object's initial height

$g=9.8 m/s^{2}$ is the acceleration due gravity

Isolating $H$ :

$t^{2}=(\sqrt{\frac{2H}{g}})^{2}$

$t^{2}=\frac{2H}{g}}$

$H=\frac{t^{2}g}{2}$

Solving with the given data:

$H=\frac{(7 s)^{2}(9.8 m/s^{2})}{2}$

$H=240.1 m$ This is the initial height

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3 years ago

Lisa surveyed 60 students at her school and found that 0.85 of the students she surveyed said their favorite class is math. Anot

Brums [2.3K]

Answer:

Step-by-step explanation:

Number of students whose favorite class is Math:

60*0.85=51

Number of students whose favorite class is Science:

15% is equal to 0.15.

60*0.15=9

Subtract number of students who like science from number of students who like math.

51-9=42

42 more students in the survey prefer math over science.

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3 years ago

Read 2 more answers

Can y’all help me on question 20 please?

kondor19780726 [428]

Answer:

i think D but i dont know

Step-by-step explanation:

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3 years ago

I need help plsss help

eduard

Answer:

Step-by-step explanation:

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3 years ago