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2 years ago

Robin can clean 72 rooms in 6 days

Mathematics

2 answers:

pentagon [3]2 years ago

8 0

Answer:

Step-by-step explanation:

Number of rooms to be cleaned in 6 days = 72

Number of rooms to be cleaned in 1 day = 72 ÷ 6 = 12

Number of rooms to be cleaned in 9 days = 12 * 9 = 108 days

lozanna [386]2 years ago

6 0

Answer:

Step-by-step explanation:

6/2*3=9

so 72/2*3= 108

so B

if my answer helps please mark as brainliest.

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Kari is adding a ribbon border to the edge of her kite. Two sides of the kite measure 9.5 inches each, and the other two sides m

Softa [21]

17.8 multiplied by 2 is 35.6
9.5 multiplied by 2 is 19
Now you take both of them and add them together.
35.6 + 19 = 54.6

Your answer should be 54.6 inches of ribbon.

Hope this helps.

8 0

2 years ago

Banking fees have received much attention during the recent economic recession as banks look for ways to recover from the crisis

alex41 [277]

Answer:

a) The 95% confidence interval to estimate the average fee for the population is between $11.65 and $12.79

b) $0.57

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.96*\frac{1.86}{\sqrt{41}} = 0.57$

So the answer for b) is $0.57.

The lower end of the interval is the sample mean subtracted by M. So it is 12.22 - 0.57 = $11.65

The upper end of the interval is the sample mean added to M. So it is 12.22 + 0.57 = $12.79

The 95% confidence interval to estimate the average fee for the population is between $11.65 and $12.79

6 0

2 years ago

PLEASE HELP ASAP 20 POINTS Find the surface area of a rectangular prism that has the following dimensions.

morpeh [17]

Answer:

156in squared

Step-by-step explanation:

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2 years ago

A circle has a circumference of 125.6 centimeters. what is the diameter of the circle to the nearest centimeter?what is the radi

natali 33 [55]

You divide 125.6 by 3.14 which = 68.66
That's the diameter. so the nearest cm is 69cm
The radius is half of the diameter so to the nearest cm it is 34cm

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2 years ago

If the measure of an acute angle is represented by x, then the measure of its complement

Luba_88 [7]

Answer:

always true

Step-by-step explanation:

complement equals that angle plus another one adds to 90. If you know that it's less than 90 degrees, then you subtract it from 90 to get the other angle which is the complement. Hope this helps!

8 0

1 year ago