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Butoxors [25]
2 years ago
6

How many total hours did the girls spend cleaning their home

Mathematics
2 answers:
solmaris [256]2 years ago
7 0

Answer:

it should be 12

Step-by-step explanation:

because 3x4=12

ANTONII [103]2 years ago
7 0

Answer: 12

Step-by-step explanation: each girl spent 3 hours cleaning, their was 4 girls so 4 x 3 = 12

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Please help with this and explain how to do it, I'll give 15 points
MrRissso [65]

Answer:

Option (4).

Step-by-step explanation:

Outer diameter of the hollow metallic ball = 10 centimeters

Outer radius of this ball = \frac{10}{2} = 5 cm

Volume of the outer ball V_{1} = \frac{4}{3}\pi (r)^3

                                         = \frac{4}{3}\pi (5)^3

Inner radius of the hollow metallic ball = (5 - 1) = 4 cm

Volume of the inner hollow ball V_{2} = \frac{4}{3}\pi (4)^3

Volume of the metal used in the metallic ball = V_{1}-V_{2}

                                                                           = \frac{4}{3}\pi (5)^3-\frac{4}{3}\pi (4)^{3}

                                                                           = \frac{4}{3}\pi [(5)^3-(4)^3]

Therefore, expression given in option (4) will be used to measure the volume of the hollow metallic ball.

8 0
2 years ago
You are making a new type of deodorant from two different mixtures the first mixture is 30% smell proof and the second mixture i
Readme [11.4K]

Answer:

600 L of 30% proof and 400 L of 80% proof is needed

Step-by-step explanation:

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Then;

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Also;

30% of x + 80% of y = 50% of 1000

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From i, x = 1000 - y

Put this into ii

0.3(1000-y) + 0.8y = 500

300 - 0.3y + 0.8y = 500

0.5y = 500-300

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y = 400 L

But x = 1000 - y

x = 1000 - 400 = 600 L

3 0
2 years ago
Abit is planning a birthday party for his grandfather. He bought a cake for \$18$18. He also wants to buy some balloons, which a
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Answer:

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Step-by-step explanation: if he try to buy  as many balloons as passible with the money he has it would be 3$


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2 years ago
Factor each trinomial completely.<br> 4x^2 - 25b^2 and x^2 - 81
GenaCL600 [577]

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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