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Anastaziya [24]
3 years ago
10

A ball is thrown into the air with an initial upward velocity of 45 ft/s its height is(h) in feet after t seconds is given by th

e function h = -16t^2 + 45t + 6 after about how many seconds will the ball hit the ground ?
a. 3
b. 5
c. 6
Mathematics
1 answer:
Iteru [2.4K]3 years ago
7 0
Is it just a b c or is there a d or more
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Please answer quickly
olchik [2.2K]

Answer:

a and c I think if I'm wrong I will try again

4 0
2 years ago
Read 2 more answers
3. Consider the equations 8 + x = n.
Scrat [10]
If n is a negative number, x would be less than -8.
3 0
2 years ago
Jim is trying to improve his speed on the track so he can qualify for the State Championships. As he is running, he goes from 70
kumpel [21]

Answer:

His acceleration is \frac{1}{15} meters per seconds²

Step-by-step explanation:

Acceleration is the rate of change of the speed

The formula of acceleration is a=\frac{v_{f}-v_{i}}{t} , where

  • v_{f} is the final speed
  • v_{i} is the initial speed
  • The unit of the acceleration is meters/second²

∵ Jim goes from 70 meters/minute (beginning speed) to

   106 meters/minute (final speed) in 9 seconds

∴ His initial speed v_{i} = 70 meters/minute

- Change it the meter per second

∵ 1 minute = 60 seconds

∴ \frac{70}{(1)(60)}=\frac{70}{60}=\frac{7}{6}  meters/second

∴ v_{i} = \frac{7}{6}  meters/second

∵ His final speed v_{f} = 106 meters/minute

- Change it the meter per second

∴ \frac{106}{(1)(60)}=\frac{106}{60}=\frac{53}{30}  meters/second

∴ v_{f} = \frac{53}{30}  meters/second

∵ The time of the change of his speed is 9 seconds

∴ t = 9

∵ The formula of acceleration is a=\frac{v_{f}-v_{i}}{t}

- Substitute the values of t, v_{i}  and v_{f} in the formula above

∴  a=\frac{\frac{53}{30}-\frac{7}{6}}{9}=\frac{1}{15}

∴ His acceleration is \frac{1}{15} meters per seconds²

3 0
3 years ago
How do I find the missing factor?
Margaret [11]
By doing a two step equation
6 0
2 years ago
A camera has a list price of $579.99 before tax. If the sales tax rate is 7.25%, find the total cost of the camera with sales ta
dezoksy [38]

Answer:

519.99(.0825) = 42.899

519.99 + 42.899 = $562.89

Step-by-step explanation:

3 0
2 years ago
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