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3 years ago

34. CONSTRUCTION A construction worker is working on the roof of a

Mathematics

1 answer:

Troyanec [42]3 years ago

6 0

Answer:

t = 6.77 s

Step-by-step explanation:

Given that,

A drop of paint falls from a rafter that is 225 feet above the ground.

We need to find the time when the paint hit the ground. Let the time be t.

Using the second equation of kinematics i.e.

$s=ut+\dfrac{1}{2}at^2$

Where

u = 0 (initial velocity is 0 as it was at rest)

a = g

So,

$225=\dfrac{1}{2}\times 9.8t^2\\\\t=\sqrt{\dfrac{2\times 225}{9.8}} \\\\t=6.77\ s$

So, it will hit the ground at 6.77 s.

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Consumer Math TestYou borrow $13,000 to buy a car. You borrow the money for 4 years and the interest rate is 2.5%. How much inte

enot [183]

Answer:

You will pay $1,300 in interest.

The final price of the car is of $14,300

Step-by-step explanation:

Simple interest formula:

$I=P\ast r\ast t$

In which:

I is the interest

P is the principal(initial value of the investment, amount borrowed,...)

r is the interest rate, as a decimal

t is the time, in years.

In this question:

Borrow $13,000, so P = 13000

4 years, so t = 4

Interest rate of 2.5%, so r = 0.025

$I=13000\ast0.025\ast4=1300$

You will pay $1,300 in interest.

Final price of the car:

Principal plus interest.

$T=P+I=13000+1300=14300$

The final price of the car is of $14,300

4 0

9 months ago

Which choice is an example of an exponential growth function?

swat32

The example of exponential growth is: c. y=0.5(1.5)x 

The function y = ab˟ is a can only be growth function if the value b>1. And if 0<b<1 it will decay. Therefore, the only correct value that fits the definition of exponential growth is option C.

4 0

3 years ago

4 an exterior angle of the triangle. Which of the following is true?

Arturiano [62]

Answer:

The answer is B

Step-by-step explanation:

Hope this helps

8 0

2 years ago

Read 2 more answers

Y=x+2 y=-3X solve system of equations algebraically

goblinko [34]

Answer:

(x,y) = -1/2 , 3/2

Step-by-step explanation:

Let y = x +2 ----- (1)

y = -3x ------ (2)

Put equal both sides x +2 = -3x

x = -3x -2

x +3x = -2

4x = -2

x = -1/2 Put it in 2nd equation

Y = -3 (-1/2)

y = 3/2

so (x,y) = -1/2 , 3/2

Hope you got it.

Please Mark as Brainliest.

8 0

2 years ago

Which is the equation of the parabola?

mestny [16]

Answer:

y = -1/20(x + 3)²

Step-by-step explanation:

Consider the parent function:

y = x²

The graph of the function open up and the vertex is at the origin, the point (0, 0)

Now, if it opens down, it means it is a reflection of the parent function over x axis, hence it has a negative coefficient, the function becomes:

y = -x²

The vertex is shifted to the point (-3, 0). It means the function also translated left by 3 units, the function becomes:

y = -(x + 3)²

Since all the options have 1/20 as a coefficient, our function is:

y = -1/20(x + 3)²

This is option B

6 0

2 years ago