Ask question

Ask question

All categories

3 years ago

12

An object is dropped from a height of 400 feet. The amount of time, in seconds, the object takes to hit the ground can be found

by solving the equation -16t^2+400=0 . How many seconds will it take to hit the ground?

1 answer:

lidiya [134]3 years ago

6 0

-16t^2+400=0

16t^2=400

take square root on both sides.

$\sqrt{16t^2} =\sqrt{400}$

4t=20

t=20/4

t=5

You might be interested in

Find the following when a = -1, b = 2, c = -1/4<br> (4b - 3)/(2a) -1

Katena32 [7]

We substitute the given into the equation
given: a=-1, b=2, c= $\frac{-1}{4}$
=( $\frac{4b-3}{2a}$ -1
= $\frac{4(2)-3}{2(-1)}$ -1
= $\frac{8-3}{-2}$ -1
= $\frac{5}{-2}$ -1
to continue, we can either find a common denominator or change the fraction to decimal.
Fraction to Decimal:
$\frac{5}{-2}$ =-2.5
Equation=-2.5-1=-3.5
OR Common Denominator:
= $\frac{5}{-2}$ $\frac{-1}{1}$ × $\frac{-2}{-2}$ (denominator should be -2=common)
= $\frac{5}{-2}$ + $\frac{2}{-2}$
= $\frac{7}{-2}$
which also = to -3.5

3 0

3 years ago

It is given that the straight line y = (q + 2)x + 10 is parallel to the straight line 4x + 2y = 5. Find the value of q.

solmaris [256]

Answer:

q= -4

Step-by-step explanation:

First, simplify 4x+2y=5

2y=-4x+5

y=-2x+5/2

q+2 has to equal to -2

q = -4

7 0

2 years ago

Formal agreement between two or more people or organizations.

Sindrei [870]

A legal contract between two individuals must be agreed upon by all parties with both parties exchanging something of value. A legal contract forms obligations between two or more parties. These agreements exchange something of value, typically goods or services.

8 0

3 years ago

A pigmy rattlesnake has an average length of 18 in., while

Strike441 [17]

Answer is down below.

Step-by-step explanation is in the photo below.

6 0

3 years ago

Which expression describes the representation given?

ser-zykov [4K]

Answer:

b.

Step-by-step explanation:

those are a lot of tabs

4 0

3 years ago

Read 2 more answers