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sergiy2304 [10]
4 years ago
12

Maria normally spends half an hour driving

Mathematics
1 answer:
Schach [20]4 years ago
5 0

Answer:

30mins =10mph

1hour =10miles

So 30mins = 5miles

Step-by-step explanation:

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There are 40 students in grade 7. 15 are boys and the others are girls a student is selected for a field trip in random. Find th
Bezzdna [24]

Answer:

There's a 37.5 percent chance that a boy will be selected.

Step-by-step explanation:

15/40=?/100

100 times 15 is 1500

1500 divided by 40 is 37.5

7 0
4 years ago
For a store contest, 4 out of every 65 people who vist the store will receive a free DVD. If 455 people vist the store, how many
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I used cross multiplication and got 28
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3 years ago
How many groups of 3/4 are in each of the following quantities? 6 1/2<br> answer as a fraction
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8 2/3

because 6 1/2 divided by 3/4 is 8 2/3
7 0
3 years ago
different animals have different fields of view. humans can generally see a 180° arc in front of them. horses can see 215° arc.
IgorLugansk [536]

Answer:

The area of the riders field of view is 987.5 square yards.

Step-by-step explanation:

The human has a 180° arc view. If the rider can see only 25 yards, the area of the riders field of view is a semi-circle (180° arc) of 25 yards of radius.

The semi-circle of 25 yards of radius has an area of:

S=\dfrac{1}{2}\pi r^2=\dfrac{1}{2}\cdot3.16\cdot (25)^2=\dfrac{1}{2}\cdot3.16\cdot625=987.5

The area of the riders field of view is 987.5 square yards.

4 0
3 years ago
Water weighs 62.4 pounds per cubic foot. How much does the water in a tank that measures 7 ft × 4 ft × 9 in, weigh?
andriy [413]

Answer:

  • <u>1,310 lb</u>

Explanation:

<u>1) Calculate the volume of the water in the tank.</u>

  • Area of the base of the tank: B = 7 ft × 4 ft = 28 ft²
  • Height of the tank: H = 9 in = 9 in × 1 ft / 12 in = 0.75 ft
  • Volume of the tank: V = area of the base × height = B × H = 28 ft² × 0.75 ft = 21 ft³.

<u>2) Calculate the weight of 21 ft³ of water.</u>

Since this is not a chemistry question but a math question, I will not use the fomula of density but set a proportion with one unknown:

  • 62.4 lb / 1 ft³ = x / 21 ft³

Solve for x:

  • x = 21 ft³ × 64 lb / ft³ = 1,310.4 lb.

So, rounding to the next integer, the water in the tank weighs 1,310 pounds, when it is full.

6 0
3 years ago
Read 2 more answers
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