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3 years ago

Please help. I will mark brainliest answer

Mathematics

1 answer:

leva [86]3 years ago

7 0

Answer:

6) ≈ 904.74 7) 88

Step-by-step explanation:

use a caulater and the proper equations

to find the volume of a sphere you must use V=4\3•π•r^3 (four thirds times pi time the radius cubed), plug in 6 into "r" in the equation and that should give you roughly 904.74

To find the volume of a pyramid you must use the equation Lwh\3 (length times width times hight product of which is divided by 3) giving you 88

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Sarah ran 26 km in 3 hours. How far could Sarah run in 5 hours.

Digiron [165]

Answer:

43.33 km

Step-by-step explanation:

Step 1: Find the amount of km Sarah can run in 1 hour

26/3

Step 2: Find the amount of km Sarah ran in 5 hours

26/3 * 5

130/3

43.33

Answer: 43.33 km

8 0

3 years ago

Jolianne worked half as many hours as Andrew. Jolianne makes $10 per hour and has saved $27. Andrew makes $8 per hour and has sa

lisabon 2012 [21]

Answer:

Step-by-step explanation:

8t = 10(1/2t) + 27

8(2t = 10(t) + 27

Number 4 is correct

4 0

4 years ago

I NEED THE ANSWER ASAP PLZ ;C

Luden [163]

The top right quadrant is quadrant 1.

The top left quadrant is quadrant 2.

The bottom left quadrant is quadrant 3.

The bottom right quadrant is quadrant 4.

Therefore, point D is in the fourth quadrant.

5 0

3 years ago

H=255-21t-16t^2 PLEASE HELP!!

Colt1911 [192]

Answer:

3.15 seconds is the answer.

Explanation

when the ball touches the ground, h =0

hence,

0=255-21t-16t²

16t²+21t-225=0

here a=16 ,b=21, c= -225

$t= \frac{ - b± \sqrt{ {b }^{2} - 4ac} }{2a} \\ \\ t= \frac{ - 21± \sqrt{ {21}^{2} - 4 \times 16 \times - 225} }{2 \times 16} \\ = \frac{ - 21 ± \sqrt{441 - ( - 14400)} }{32} \\ = \frac{ - 21± \sqrt{14841} }{32} \\ = \frac{ - 21±121.82}{32} \\ \\ t = \frac{ - 21 + 121.82}{32} \: or \: \: t = \frac{ - 21 - 121.82}{32} \\ t = 3.15 \: \: or \: \: t = - 4.46$

time cannot be negative, hence t = -4.46 can be avoided

The ball takes 3.15 seconds to hit the ground.

4 0

3 years ago

Find three consecutive integers such that the sum of twice the second integer and 4 times the third integer is two less than sev

valentinak56 [21]

Answer:

12,13 and 14

Step-by-step explanation:

Let the three consecutive integers be n, n+1 and n+2

ATQ,

The sum of twice the second integer and 4 times the third integer is two less than seven times the first integer.

[2(n+1)+4(n+2)] = 7n-2

2n+2+4n+8=7n-2

Taking like terms together,

6n-7n = -2-8-2

n = 12

So,

First integer = 12

Second integer = 12+1 = 13

Third integer = 12+2 = 14

Hence, three consecutive integers are 12,13 and 14.

8 0

3 years ago