2 years ago

Tom babysat for 4 1/2 hours. If he charges $8 an hour, how much will he earn?

Mathematics

1 answer:

Minchanka [31]2 years ago

6 0

Answer:

$36

Step-by-step explanation:

4.5 * 8 = 36

4 * 8 = 32

1/2 of an hour would be 1/2 of 8= 4

4+32 = $36

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Two trials are conducted for an experiment. In Trial A, the measured value is 240, while the actual value is 200. In Trial B, th

Zepler [3.9K]

Answer:

A is the answer 456% and 512%

Step-by-step explanation:

Percent Errors

Trial A

Trial B

Measured Value

240

195

Actual Value

200

240

Percent Error

Complete the table.

Percent Errors

Trial A

Trial B

Measured Value

240

195

Actual Value

200

240

Percent Error

440440%

435435%

5 0

1 year ago

A hospital uses cobalt-60 in its radiotherapy treatments for cancer patients. Cobalt-60 has a half-life of 7

NeTakaya

Answer:

We have 197 g of Co-60 after 18 months.

Step-by-step explanation:

We can use the decay equation.

$M_{f}=M_{i}e^{-\lambda t}$

Where:

M(f) and M(i) are the final and initial mass respectively
λ is the decay constant (ln(2)/t(1/2))
t(1/2) is the half-life of Co
t is the time at the final amount of m

$M_{f}=228e^{-\frac{ln(2)}{7} 1.5}$

$M_{f}=197\: g$

Therefore, we have 197 g of Co-60 after 18 months.

I hope it helps you!

4 0

2 years ago

Solve for x. x+3.2=−3.5 (Any help at all is greatly appreciated!)

Maksim231197 [3]

You have to subtract 3.2 from 3.5 to get x. 0.3+ 3.2=2.5 so x=0.3

7 0

3 years ago

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Their are 5280 feet in 1 mile. How many inches are there in 4 miles

schepotkina [342]

Answer:

21120

Step-by-step explanation:Because you take 5280 and multiply it by 4

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2 years ago

If there are n ways of completing a task, and after completing the task in any of these n ways, there are m ways of completing a

mel-nik [20]

Answer:

Step-by-step explanation:

n × m = nm ways

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2 years ago