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Rudiy27
3 years ago
6

A baseball is hit with an initial vertical velocity of 121 feet per second and the ball was hit 1 foot above ground. How high is

the ball after 4 seconds?
h = −16t^2 + 121t + 1
Mathematics
1 answer:
Viktor [21]3 years ago
5 0

Answer:

After 4 seconds, the ball is at 229 ft

Step-by-step explanation:

Here, we want to get the height of the ball at 4 seconds

What we have to do here is to substitute the value of t for 4 seconds in the equation

We have;

h = -16(4^2) + 121(4) + 1

h = -256 + 484 + 1

h = 229 ft

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Answer:

Step-by-step explanation:

8 0
3 years ago
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Which is a better buy, 4 lunches for $57 or 5 lunches for $71?
worty [1.4K]
Answer: 5 lunches for $71 is better
57/4=14.25
71/5=14.2
3 0
3 years ago
Find the reference angle given: t= -5π/3.
Elina [12.6K]

Answer:

The reference angle is \frac{\pi}{3}

Step-by-step explanation:

The given angle is t=-\frac{5\pi}{3}

The reference angle is the acute angle, that a given angle  makes with the x-axis.

First let us make a sketch of the given angle. <em>See diagram in attachment.</em>

Let \theta be the reference angle of  t=-\frac{5\pi}{3}


Then, from the diagram, we need to subtract \theta from -\frac{5\pi}{3} to get to -2\pi.


We can therefore write the following equation and solve for \theta.


\Rightarrow -\frac{5\pi}{3}-\theta=-2\pi


We group like terms to get,

\Rightarrow -\theta=-2\pi +\frac{5\pi}{3}

We collect LCM to get,

\Rightarrow -\theta=\frac{-6\pi+5\pi}{3}

We simplify to get,

\Rightarrow -\theta=-\frac{\pi}{3}

We divide through by -1

\theta=\frac{\pi}{3} to get,

The correct answer is D.







4 0
3 years ago
Question 1
grandymaker [24]

Answer:

  see attached

  angles: 39.8°, 68.2°; side: 8

Step-by-step explanation:

The triangle and its measurements are shown in the attachment.

_____

If you do this with pencil and paper and protractor, likely your angle measurements will only be to the nearest degree.

8 0
3 years ago
What is the solution for the equation 5/3b^3-2b-5=2/b3-2
irinina [24]

Answer:

Option C is correct.

Step-by-step explanation:

Given Equation:

\frac{5}{3b^3-2b^2-5}=\frac{2}{b^3-2}

To find: Solution of the Equation.

Consider,

5(b^3-2)=2(3b^3-2b^2-5)

5b^3-10=6b^3-4b^2-10

6b^3-5b^3-4b^2+10-10=0

b^3-4b^2=0

b^2(b-4)=0

b² = 0   ⇒ b = 0

b - 4 = 0 ⇒ b = 4

Therefore, Option C is correct.

7 0
2 years ago
Read 2 more answers
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