Which expression is equivalent to 3 x 5x5x5x5x5 x 5? 156 157 3(5) 6 3(5)?

Mathematics

2 answers:

Studentka2010 [4]3 years ago

8 0

The answer would be “3(5) 6” because you are multiplying 3 and 5 six times

kotykmax [81]3 years ago

3 0

Answer:

3(5^6)

Step-by-step explanation:

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Marta walked 2 miles in 28 minutes. at that rate how far can she walk in 70 minutes

soldi70 [24.7K]

28 mins = 2 miles

1 min = 2 ÷ 28 = 1/14 miles

70 mins = 1/14 x 70 = 5 miles

Answer: 5 miles

7 0

3 years ago

A machine covers 5/8 square foot in 1/4 hour

VLD [36.1K]

The question is incomplete. Here is the complete question:

A machine covers 5/8 square foot in 1/4 hour. what is the unit rate?

Answer:

2.5 square feet per hour

Step-by-step explanation:

Given:

Area covered by a machine = $frac{5}{8}\ ft^2$

Time taken to cover the given area = $\frac{1}{4}\ h$

Now, unit rate of the first quantity with respect to second quantity is the magnitude of the first quantity being when the second quantity is one unit.

Here, the first quantity is the area covered and the second quantity is the time taken.

So, unit rate is the area covered by the machine in 1 hour.

In order to find that, we use the unitary method and divide the area by the total time taken. Therefore,

$Unit\ rate=\frac{Total\ area\ covered}{Total\ time\ taken}\\\\Unit\ rate=(\frac{5}{8}\ ft^2)\div (\frac{1}{4}\ h)\\\\Unit\ rate=\frac{5}{8}\times \frac{4}{1}\ ft^2/h\\\\Unit\ rate=\frac{20}{8}=2.5\ ft^2/h$