A ball is thrown into the air from a height of 9cm above the ground, and its height is given by S=128+32t-16t^2, where t is the time in seconds1) find the values of t that makes S=0.
2) Do both of the values of t have meaning for this application? Explain why

Answers

Answer 1

Answer: -16t² + 32t + 128 = 0
-16t² + 64t - 32t + 128 = 0
-16t(t - 4) - 32(t - 4)
(-16t - 32)(t - 4) = 0
-16t -32 = 0 t - 4 = 0
-16t = 32 t = 4
t = -2

t = -2 and t = 4 are the values that makes S = 0.
Yes, because if you apply either of these values alone, S will be 0.

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Answers

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Step-by-step explanation:

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Write 7 over 10 as a percentage

Answers

70%

A percentage is the same thing as a fraction with a denominator of 100. To make our current denominator change to 100, we must multiply it by 10. So, we must do the same thing to the numerator. 7 times 10 is 70, and 10 times 10 is 100. This means 7/10 equals 70/100, which is 70%.

What is 1.2498 rounded to the nearest hundredth?

Answers

It is 1.25
Since, 9 is above the number 4, you have to round up.

When you round find the place your rounding to so
1.249
Look at the nine and then the 4 in the hundreths place
The nine make the 4 go up
so the anwser is 1.25
Hope I helped
with Hugs ~L

The amounts of paper waste generated in a region during two years were 41,300,000 tons and 50,500,000 tons. What was the total paper waste generated over these two years in the region, expressed in scientific notation?

Answers

So first you need to add the two years together to get 91,800,000 from there you can start to turn it into scientific notations. First start out by putting an imaginary decimal point at the end so you have 91,800,000. From there you need to move the decimal next to the 9 so 7 spots to the left. This means that when you are converting back from SN you would go 7 spots to the right. Therefore when you write this in SN you will have 10 to the power of positive 7.Now that you have the number and the exponent you just put them together and you have 9.18 x 10^7 . I hope this helped and if you have any questions about how I got this answer feel free to message me.

Just add 41,300,000 to 50,500,000. That is 91,300,000.00 tons. Scientific Notation just moves the decimal point to the beginning. So it would be 9.13*10^7

hallie has 10 times as many pages to read for her homework assignment as janet, altogether , they have to read 264 pages. how many pages does each girl have to read

Answers

they read all together you divide then the quotient you divide it by 10 that's how u get ur answer13.2

Let $j$ be the number of pages Janet has to read.
so Hallie has $10j$ pages to read.
Altogether, they must read $10j + j$ pages, which is $11j$ . So this means that $11j$ must be equal to $264$ .
If you divide both bits by $11$ , you get $j = (264)/(11) = 24$ .
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