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NeX [460]
3 years ago
12

A cement block is in the shape of a rectangular prism that measures 4.5 feet by 7.25 feet by 6.5 feet. The entire block must be

painted.
How many square feet will be painted?

Enter your answer in the box.
Mathematics
2 answers:
irakobra [83]3 years ago
6 0
I am pretty sure that if you are looking for perimeter there should only be two sets of numbers but if you are looking for area than the answer would be 212.0625 
ivann1987 [24]3 years ago
3 0

Answer:

218 square feet will be painted.

Step-by-step explanation:

A cement block is in the shape of a rectangular prism that measures 4.5 feet by 7.25 feet by 6.5 feet.

Rectangular prism is a cuboid shape. We have to find the total surface area of cuboid.

Formula:

\text{Total surface area}=2(lb+bh+lh)

where, l=4.5 feet, b=7.25 feet and h=6.5 feet .

\text{Total surface area}=2(4.5\times 7.25+7.25\times 6.5 +6.5\times 4.5)

\text{Total surface area}=218\text{ ft}^2

We will paint entire block of cement i.e must be equal to 218 square feet.

Hence, 218 square feet will be painted.

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vovikov84 [41]

Answer:

All of the values in the data are used in calculating the mean.

The sum of the deviations is zero.

There is only one mean for a set of data.

Step-by-step explanation:

Required

True statement about arithmetic mean

(a) False

The mean can be equal to, greater than or less than the median

(b) True

The arithmetic mean is the summation of all data divided by the number of data; hence, all values are included.

(c) True

All mean literally represent the distance of each value from the average; so,  when each value used in calculating the mean is subtracted from the calculated mean, then the end result is 0. i.e.\sum(x - \bar x) = 0

(d) True

The mean value of a distribution is always 1 value. When more values are added to the existing values or some values are removed from the existing values, the mean value will change.

(e) False

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3 0
3 years ago
A teacher claims that the proportion of students expected to pass an exam is greater than 80%. To test this claim, the teacher a
erica [24]

Answer:

z=-1.591

Step-by-step explanation:

Null Hypotheses,

H_0 : p=0.8\\H_a: p>0.80

So we use z-test for one population proportion (right-tailed test)

According to this informaton, we defined that

\alpha=0.05

z_c=1.64 (critical value)

So our Rejection region is R={z:z>1.64}

z=\frac{\bar{p}-p_0}{\sqrt{p_0(1-p_0)/n}} = \frac{0.755-0.8}{\sqrt{0.8(1-0.8)/200}}=-1.591

Not rejection.

6 0
3 years ago
Hong rented a truck for one day. There was a base fee of $20.95, and there was an additional charge of 90 cents for each mile dr
Goryan [66]

Answer: Hong drove the truck for 294 miles.

Step-by-step explanation:

Let m represent the number of miles for which he drove the truck.

There was a base fee of $20.95, and there was an additional charge of 90 cents for each mile driven. It means that the expression for the cost of driving the truck for m miles in a day is

20.95 + 0.9m

Hong had to pay $285.55 when he returned the truck. It means that

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0.9m = 285.55 - 20.95

0.9m = 264.6

m = 264.6/0.9

m = 294 miles

5 0
3 years ago
The difference when 7 less than a number is subtracted from twice the number is 12. What is the number?
Softa [21]
2n-(n-7)=12
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12-7=5
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6 0
3 years ago
On Thursday, 72% of the customers at a frozen yogurt shop ordered vanilla frozen yogurt. If 180 customers ordered vanilla frozen
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180 of 72% is 129.6. 180*72= 12960. Since 72% = .72, you need to put the decimal 2 places behind the decimal.
6 0
3 years ago
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