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2 years ago

8

An arrow is shot vertically upward at a rate of 210 feet per second. Use the projectile formula h = −16t2 + v0t to determine at

what time t (in seconds) the height of the arrow will be 400 feet.

1 answer:

Klio2033 [76]2 years ago

7 0

Answer:

Time equal to 3.30 seconds when the arrow was going up.

Time equal to 7.94 seconds when the arrow was going down.

Step-by-step explanation:

Trust me

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You place a billiard cue against a billiard table. The foot of the billiard cue is 15 cm away from the table and the top of the

Luba_88 [7]

Answer:

-4

Step-by-step explanation:

<u>The billiard cue is 15 cm away from the table</u>

This refers to coordinates of (15, 0)

<u>The billiard cue touches the table at a point 60 cm off the ground</u>

This refers to coordinates of (0, 60)

<u>The slope is as per slope formula;</u>

m = (60 - 0)/(0-15) = 60/ -15 = -4

Thea answer is -4

6 0

3 years ago

Read 2 more answers

Rachel finished 3/4 of the race in 6 hours. How long was the entire race?

Ugo [173]

The answer is a total of 9 hours

5 0

2 years ago

Janet’s savings account has $12.10 more than the $242 it had at the beginning of the year. What percent more was in the savings

Ilia_Sergeevich [38]

5% is the answer!! :)

5 0

2 years ago

Find a polynomial, which, when added to the polynomial 5x2–3x–9, is equivalent to: x2−5x+6

Bess [88]

The required polynomial is: $-4x^2-2x+15$

Step-by-step explanation:

Let P be the polynomial that has to be found

Given

One polynomial = $5x^2-3x-9$

Sum of both polynomials = $x^2-5x+6$

So,

$(5x^2-3x-9) + P = x^2-5x+6\\P = x^2-5x+6 - (5x^2-3x-9)\\P = x^2-5x+6-5x^2+3x+9\\P = x^2-5x^2-5x+3x+6+9\\P = -4x^2-2x+15$

Hence,

The required polynomial is: $-4x^2-2x+15$

Keywords: Polynomials, expressions

Learn more about polynomials at:

#LearnwithBrainly

3 0

2 years ago

penguins spent almost 75% of their lives in the sea .An emperor penguin in the wild has a lifespan about 18 years . About how ma

11Alexandr11 [23.1K]

First of all, in Mathematics, OF usually represents multiplication. And % means over 100. Anyway, the question basically means 75/100 multiplied by the lifespan. According to the question, the lifespan is 18 years. So that will be;
75/100 x 18
1350/100
13.5
So your answer is 13.5 years. Hope i helped. Have a nice day.

5 0

3 years ago