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weqwewe [10]
3 years ago
12

QUICK, BRAINLIEST FOR 1ST ANSWER. 14.5 is incorrect!

Mathematics
1 answer:
ra1l [238]3 years ago
4 0
To get the *percent increase* from week 1 to week 2, we calculate the change in distance from week 1 to week 2 (13.5 - 12.5 = 1 mile) over the week 1 distance (12.5 miles). Doing that, we find that Matthew increased his distance by

1/12.5 = 0.08, or 8%

We’re given that he’ll increase his distance by the same percentage from week 2 to 3, so to find his week 3 distance, we can find 8% of the week 2 distance and add that on. 8% of 13.5 miles is 0.08 x 13.5 = 1.08 miles, so by week 3, he’ll be running 13.5 + 1.08 = 14.58 miles.
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1
cricket20 [7]

Answer:

<em>5.33 secs</em>

Step-by-step explanation:

Given the equation of the height modeled by the equation/

h(t) = -3.2 + 12.5t + 24.8

The object strikes the ground when the height h(t) is zero

Substituting h(t) = 0 into the expression

h(t) = -3.2t² + 12.5t + 24.8

0 =  -3.2t² + 12.5t + 24.8

-3.2t² + 12.5t + 24.8 = 0

Multiply through by minus sign

3.2t² - 12.5t - 24.8 = 0

From the expression a = 3.2, b = -12.5 and c = -24.8

t = -(-12.5)±√(-12.5)²-4(3.2)(-24.8)/2(3.2)

t = 12.5±√156.25+317.44)/6.4

t = 12.5±√473.69/6.42

t = 12.5±21.76/6.42

t = 12.5+21.76/6.42

t = 34.26/6.42

t = 5.33secs

<em>Hence the object strike the ground after 5.33 secs</em>

3 0
2 years ago
Can someone double check my answers on this integers sheet? (53 points)
MatroZZZ [7]
1) -28
2) +36
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4)-129
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(they are all correct up to this point)

Yes, 1--5 in sentences are all right 

hope this helps
4 0
3 years ago
According to the stem-and-leaf plot above, how many trees are less than 640
andreev551 [17]

Answer:

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andreyandreev [35.5K]

Answer:

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What is the answer???
Natali [406]

Answer:

7

Step-by-step explanation:

3 0
3 years ago
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