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Ierofanga [76]
3 years ago
15

A ball is thrown from an initial height of 2 feet with an initial upward velocity of 29 ft/s. The balls height (h) [in feet] aft

er t seconds is given by the following
h=2+29t-16t^2
Find all the values for t for which the balls height is 14 feet

Mathematics
1 answer:
nirvana33 [79]3 years ago
5 0
The ball is at a height of 14 feet after 1.17 and 0.64 seconds.

This is an example of a quadratic equation. Write out the equation with 14 in the place of the height. Then, set it equal to zero.

14 = 2 + 29t - 16t^2

0 = -16t^2 + 29t -12

Now, we can use the quadratic equation to solve.
A = -16
B = 29
C = -12

You will get the solutions of 1.17 and 0.64.
You might be interested in
Unit 1: Scientific Notation Constructed Response Assignment
balu736 [363]
brainly.com/question/5027087

Let C, S and H be the diameters of cell, sand and hair


Diameter of a cell: C=1 \cdot 10^{-5}m

Diameter of a grain of sand: S=2 \cdot10^{-4}m

Part A:

H=0.000025=2.5 \cdot 10^{-5} meters, because it takes 5 movements right of the decimal dot, until there is only one digit to its left.

Part B:

we are comparing S=2 \cdot10^{-4} m to C=1 \cdot10^{-5} m ,

\frac{S}{C}= \frac{2 \cdot 10^{-4}}{1 \cdot 10^{-5}}=\frac{20 \cdot 10^{-5}}{1 \cdot 10^{-5}}=20

thus S is 20 times larger than C

Part C

1m=1 \cdot10^9nm

thus,

H=2.5 \cdot 10^{-5}m=2.5 \cdot 10^{-5} \cdot 1 \cdot 10^9nm=2.5 \cdot 10^{-5+9}=2.5\cdot10^4nm

Part D.

1m=1\cdot 10^9nm\\\\1nm=\displaystyle{ \frac{1m}{10^9}=1\cdot 10^{-9}m}

thus 300 nm are written in meters as follows:

300nm= 300\cdot 1\cdot 10^{-9}m=3\cdot 10^2 \cdot 10^{-9}m=3\cdot 10^{-7}m
5 0
3 years ago
The data gives the responses of 15 students who were asked how many text messages they send in a day.
Lubov Fominskaja [6]
Noy completwly possitive what yhe quesrion is asking for but The number that shows up most often is 55 but the mean (average) is 50.06
8 0
4 years ago
Last year, Nicholas started babysitting to earn extra spending money. Over the summer, he tracked how much money he earned at ea
Ierofanga [76]

Answer:

25%

Step-by-step explanation:

The 5 values of the given box plot are;

The minimum value = 20

The first quartile, the 25th percentile point, Q₁ = 25

The median or second quartile, the 50th percentile point, Q₂ = 30

The third quartile, the 75th percentile point, Q₃ = 40

The maximum value = 55

The range = The maximum value - The minimum value

∴ The range = 55 - 20 = 35

We note that Nicholas earned $25 or less from the minimum value up to first quartile, Q₁, which is the 25th percentile point, where we have 25 percent of the data points

Therefore, the percent of the time Nicholas earned $25 or less is 25 percent of the time.

8 0
2 years ago
Can you help with this one: Dorthy Katz, a computer programmer, earns regular hourly rate of 32.25 and time and a half when she
Katena32 [7]

a) 32.25* 40 = 1290

b) 32.25 (1.5) *12 =580.50

c) 1290+580.50=1870.50

3 0
3 years ago
HELP ILL AWARD BRAINLIEST
inna [77]

Answer:

Think about it

Step-by-step explanation:

If you made $20 in 2 hrs you made $10 per hour

To find out how much you make per certain number of hrs multiply $10 by the number of hours

The equation is y = 10x + 0 <-- this is also answer to number 4

10x is the constant of proportionality I think.

5 0
3 years ago
Read 2 more answers
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