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PIT_PIT [208]
2 years ago
10

Abandoned mines frequently fill with water. Before an abandoned mine can be reopened, the water must be pumped out. The size of

pump required depends on the depth of the mine. If pumping out a mine that is D feet deep requires a pump that pumps a minimum of + 4D – 250 gallons per minute, pumping out a mine that is 150 feet deep would require a pump that pumps a minimum of how many gallons per minute?
Mathematics
1 answer:
ale4655 [162]2 years ago
5 0

Answer:

350gallons /minute

Step-by-step explanation:

D = minimun depth of mine

4D-250 = minimum gallon per minute required to pump

4(150)- 250= 350gallon/minute

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2 years ago
Bought computer for $500. Marked down $50. Plus a 25% discount off original price. What is the original price?
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So 500+50=550

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8 0
3 years ago
Read 2 more answers
If 8 g of a radioactive substance are present initially and 2 yr later only 4 g remain, how much of the substance will be presen
My name is Ann [436]

Answer:

none

Step-by-step explanation:

8-4=4

if every 2 years, 4 gallons disappear

then every 1 year, 2 gallons disappear

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7 0
2 years ago
does anyone understand this or can anyone explain what i need to do please ?? there’s no instructions
Contact [7]

Answer:

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3 0
2 years ago
A pencil and a ruler cost 2.50 together. The ruler costs $1.00 more than the pencil. How much is the pencil
Alenkasestr [34]
P + r = 2.50
r = p + 1

p + p + 1 = 2.50
2p + 1 = 2.50
2p = 2.50 - 1
2p = 1.50
p = 1.50/2
p = 0.75 <=== pencil cost 75 cents

r = p + 1
r = 0.75 + 1
r = 1.75 .....ruler cost 1.75
6 0
3 years ago
Read 2 more answers
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