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a_sh-v [17]
2 years ago
5

A ball is launched into the sky at 54. 4 ft./s from a 268.8 m tall building. The equation for the ball’s height, h, at time t se

cond’s is h= -3.2t^2 + 54.4t+ 268.8. When will the ball strike the ground?
Mathematics
1 answer:
Crank2 years ago
6 0

Answer:

t = 21

Step-by-step explanation:

The ball strikes the groujd when h = 0.

-3.2t^2 + 54.4t+268.8=0 \\ \\ 32t^2 - 544t-2688=0 \\ \\ t^2 - 17t-84=0 \\ \\ (t-21)(t+4)=0 \\ \\ t=-4, 21

Since time must be positive, t = 21.

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Mamont248 [21]

Answer:

Top right is QI, top left is QII, bottom left is QIII, bottom right is QIV

Step-by-step explanation:

the quadrants start with one at the top left and rotate counterclockwise, rotate to the left

7 0
3 years ago
If 120 L of an acid solution is 75% acid, how much pure acid is there<br> in the mixture?
Sunny_sXe [5.5K]

Answer:

25% or 30L

Step-by-step explanation:

100% is 120L, we know 75% is acid, we need the other 25% to make the 100%. 25% of 120 is 30, so 30 liters is pure acid

7 0
3 years ago
You meet with the financial aid office to discuss your costs for attending MGA next semester. Tuition is $113.67 per credit hour
jenyasd209 [6]

Answer:

$1615.05

Step-by-step explanation:

First the cost. We know that tuition per credit hour is 113.67 and there is a flat fee of 660. This can be represented by 113.67h + 660, where h is equal to the number of credit hours.

Next, the amount paid. There are two constants of 350 and 400 already there. We can represent the remaining amount that needs to be paid by another variable, x.

Now, the cost needs to be equal to the amount you pay. We can replace h with 15 for 15 hours and solve for x.

113.67h + 660 = 350 + 400 + x

113.67(15) + 660 = 350 + 400 + x

1705.05 + 660 = 750 + x

2365.05 = 750 + x

1615.05 = x

3 0
3 years ago
Need help on this question. Will give brainliest
Llana [10]

Answer: C

Step-by-step explanation:

Bcuz when its square it results to something known as the perfect square trinomial. Thats the way i learned it. Ion know if u learned it the same way pero i hope this helps.

3 0
2 years ago
Between which two consecutive whole numbers does \sqrt{3} 3 ​ lie? Fill out the sentence below to justify your answer and use yo
lyudmila [28]

Answer:

It lies between 5 and 6

Step-by-step explanation:

Two consecutive numbers are numbers that come after each other:

x , x + 1 are consecutive numbers.

3 \sqrt{3} = 3√3 = 5.19615242271

Therefore, from the above calculation, we can see that square root of 3 is a number that is between consecutive numbers 5 and 6

3 0
3 years ago
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