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grin007 [14]
3 years ago
12

I need help with #24 please :)

Mathematics
1 answer:
kakasveta [241]3 years ago
6 0

Answer:The answer is B

Step-by-step explanation:

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Josh swam 25 laps in 50 minutes. At that rate, how long will it take to swim 35 laps?
GrogVix [38]

Answer:

70 Minutes

Step-by-step explanation:

Divide 25 into 50 to get 2 and then multiply 2 x 35 to get 70

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3 years ago
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PLEASE ANSWER ILL GIVE 5 STARS AND A HEART!!!
r-ruslan [8.4K]

Answer:

120

Step-by-step explanation:

5x6 = 30

30x4= 120

7 0
2 years ago
An hourglass consists of two sets of congruent composite figures on either end. Each composite figure is made up of a cone and a
belka [17]
Answer: third option 268.8

Explanation:

For this kind of proble it is very important that you attach the figure because it contains important information to understand the question.

I have attached the figure for better understanding.

1) The top portion (and the bottom is congruent but rotated 180°) of the hourglass is a figure equivalent to a cylinder on top and a cone on bottom.

So the total volume contained in the top portion is the volume of a cylinder + the volume of a cone.

This is how you calculate the volume of the top portion:

1) The height of the cylinder is 54 mm - 18 mm = 36 mm

2) The formula for the volume of a cylinder is V = π (radius)^2 * height

radius = 8 mm
height = 36 mm

=> V = π(8mm)^2 * 36 mm = 2304π (mm)^3

3) The formula for the volume of a cone is V = (1/3)π(radius)^2 * height

radius = 8 mm
height = 18 mm

V = (1/3)π(8mm)^2 * 18 mm = 384π (mm)^3

4) The total volume of the top portion is volumen of the cylindrical part + voume of the cone:

Total voluem = 2304π (mm)^3 + 384π (mm)^3 = 2688π (mm)^3

5) To find the number of seconds <span>it take until all of the sand has dripped to the bottom of the hourglass you have to divide the total volumen of sand by the rate:

time in seconds = total volume of sand / rate of dripping

time in seconds = [2688 π (mm)^3 ] / [10π (mm)^3 / s] = 268.8 s

That is the answer: 268.8 s
</span>

4 0
3 years ago
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Select the correct answer.<br> Given the formula below, solve for x.<br> y - y1 = m(x - x1)
mario62 [17]
C would be the right answer just done the test
7 0
3 years ago
8-6x&gt;-18 solve for x
EleoNora [17]

Answer:

x=5

Step-by-step explanation:

Well all i did was guess a random number from 1-10 so I could see what numbers make the equation bigger than -18 and the fist thing I guessed was 5 so this is what I did

8-6*5=-22

And them I said let me see if any multiples equal -18 so I went to for and did this

8-6*4=-16

That's when I guessed the answer if i looked at the sign correctly!

8 0
3 years ago
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