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VladimirAG [237]
3 years ago
15

Read the word problem below. Chan rows at a rate of eight miles per hour in still water. On Wednesday, it takes him three hours

to row upstream from his house to the park. He rows back home, and it takes him two hours. What is the speed of the current? Which of the following is a clue that would help solve this word problem? The rate of Chan’s rowing in still water is 8 mph. Chan rows from the house to the park on Wednesday. Chan’s house is next to a river. The entire trip takes five hours.
Mathematics
1 answer:
Romashka-Z-Leto [24]3 years ago
3 0

Answer:

its A

Step-by-step explanation:

i literally just took the test

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In a video game, a bird is flung on a sling shot and follows a parabolic path. The path of the bird can be modeled by the equati
Novay_Z [31]

Answer:

The bird will take 0.88 seconds to reach a height of 40 feet in the air for the first time

Step-by-step explanation:

we have

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The vertex represent a maximum

where

h is the height of the bird

t is the amount of time, in seconds, the bird had been in the air

For h=40 ft

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-16t^2+55t-36=0

The formula to solve a quadratic equation of the form

ax^{2} +bx+c=0

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in this problem we have

-16t^2+55t-36=0

so

a=-16\\b=55\\c=-36

substitute in the formula

x=\frac{-55\pm\sqrt{55^{2}-4(-16)(-36)}} {2(-16)}

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3 years ago
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Answer:

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8 0
2 years ago
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