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Ber [7]
2 years ago
15

Why does the shape of the moon appear to change over the course of about a month? (2 points)

Mathematics
1 answer:
kirill [66]2 years ago
5 0
B. The sun is lighting up different amounts of the moon
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in a school gym, the ratio of the number of boys to the number of girls was 4:3 . after 160 boys left the gym, the ratio became
Annette [7]

Answer:

300 girls were there in the gym.

Step-by-step explanation:

Given:

The ratio of the number of boys to the number of girls was 4:3, after 160 boys left the gym, the ratio became 4:5.

Now, to find the number of girls in the gym.

The girls in the gym does not left, their quantity is same before and after.

So, we multiply the both ratios to make the girls ratio same:

4:3 × 5 = 20:15

4:5 × 3 = 12:15

Now, <em>we find the units of the ratio</em>.

<em>The ratio of boys dropped down by 160</em>:

20 - 12 = 8 units.

160 = 8 units

Now, dividing both sides by 8 we get:

20 = 1 unit

So, 1 unit = 20.

Now, girls = 15 units

So, 15 × 20 = 300.

Therefore, 300 girls were there in the gym.

3 0
3 years ago
school guidelines require that there must be at least 2 chaperones for every 25 students going on a school trip how many chapero
elena-s [515]
5 chaperones are needed for the trip
3 0
3 years ago
Read 2 more answers
Scientific notation 100400
ad-work [718]
1.004 * 10^5
all scientific notation equations have to be a number greater than 1 but less than 10
then multiplied by 10 to the power of (move the decimal point to the right however many times you need, in this case 5) :)
5 0
3 years ago
The number of kilograms of water in a human body varies directly as the mass of the body. A 72 kg person contains 48 kg of water
Tanzania [10]

Step-by-step explanation:

N=km

72=k×48

72=48k

k=72/48

k=1.5

N=1.5m

N=1.5×144

N=216

3 0
2 years ago
What is the image of the point (-1,-3)(−1,−3) after a rotation of 90 degrees counterclockwise about the origin?
ycow [4]

Answer:

(3,-1)

Step-by-step explanation:

6 0
3 years ago
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