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My name is Ann [436]
3 years ago
10

Fuad’s model racing car drives at an average speed of 3 feet per second. Fuad records the distances and times in a table like th

e one shown below. Speed of Model Race Car Distance (ft.) 3 Time (s) 1 At this rate, how long will it take the car to travel 21 feet?
Mathematics
2 answers:
Nikitich [7]3 years ago
5 0

Answer:

9 seconds

Step-by-step explanation:

3 feet per second divided by 21 feet which is 9

seropon [69]3 years ago
4 0

Answer:

7.0 seconds

Step-by-step explanation:

i did the test but how i know this is bc 3 divided by 21 is 7

NOT 9

DON'T USE 9 AS THE ANSWER

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Answer:

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Step-by-step explanation:

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3 years ago
The height h, in feet of a model rocket t seconds after launch is given
Illusion [34]

Answer:

h_max = 324.09 ft

Step-by-step explanation:

The correct equation is;

h = 245t - 16t²

We are told that as the rocket descends, it deploys

a recovery parachute when it reaches 325 feet above the ground.

Thus;

245t - 16t² = 325

Thus;

16t² - 245t + 325 = 0

Using quadratic formula, we have the roots as;

t = 1.47s or 13.85s

We will pick the higher value.

Thus;

Maximum height will occur at t = 13.85 s

Thus, plugging in 13.85 for t into h = 245t - 16t², we have;

h_max = 245(13.85) - 16(13.85)²

h_max = 324.09 ft

7 0
3 years ago
In how many ways can you<br> select 3 books to bring on<br> vacation from a group of 11<br> books?
Harlamova29_29 [7]

Answer:

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5 0
3 years ago
Solve for y in -8×+4y=24
s344n2d4d5 [400]

Factor out the common term 4

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Subtract 2x from both sides

-y = -6 - 2x

Multiply both sides by -1

y = 6 + 2x

5 0
3 years ago
There are 25 scented candles left in stock on eBay. On amazon there are 12 + (9x3) scented candles left. How many scented candle
oksano4ka [1.4K]
(9x3)= 27 +12= 39. 39 is the answer
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