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3 years ago

MRS SMITH BOUGHT 3 YARDS OF RIBBON FOR 5.25. HOW MUCH WOULD 5 YARDS OF THE SAME RIBBON COST?

2 answers:

6 0

$8.75

Explanation: first you divide $5.25 by 3 to see how much each yard is. Each yard e yaks out to be $1.75, then you multiply $1.75 by 5 to get $8.75

laila [671]3 years ago

5 0

Answer:

8.75

Step-by-step explanation:

5.25/3 =1.75

1.75*5 =8.75

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How many unit cubes are on each layer of this cube

gogolik [260]

There are 16 on each layer and 96 in total

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3 years ago

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You have an above ground pool that is 20 feet in diameter. One bag of sand does three square feet. How many bags of sand do you

r-ruslan [8.4K]

Answer: Number of sand bags are 105

Step-by-step explanation:

Alright, lets get started.

The diameter of pool is given as : $20 \ \text{feet}$

The radius of pool will be : $r=\frac{20}{2}=10$

So the area of the pool will be:

Area = $\pi r^2$

Area = $\pi *10^2$

Area = $100 \pi$

Area = $314.16$

3 square feet is covered by 1 sand bag, so

314.16 square feet will be covered by : $\frac{314.16}{3}$

So, no of sand bag = $104.7$

Rounding off to nearest number

Number of sand bags are 105 : Answer

Hope it will help :)

8 0

4 years ago

Use the given sample data to construct the indicated confidence interval for the population mean. The principal randomly selecte

Lunna [17]

Answer:

The 90% confidence interval

(74.71, 82.63)

Step-by-step explanation:

Confidence Interval Formula is given as:

Confidence Interval = μ ± z (σ/√n)

Where

μ = mean score

z = z score

N = number of the population

σ = standard deviation

The mean is calculated as = The average of their scores

N = 6 students

(71.6 + 81.0 + 88.9 + 80.4 + 78.1 + 72.0 )/ 6

Mean score = 472/6

= 78.666666667

≈ 78.67

We are given a confidence interval of 90% therefore the

z score = 1.645

Standard Deviation for the scores =

s=(x -σ)²/ n - 1 =(71.6 - 78.67)²+(81.0 - 78.67)²+(88.9 - 78.67)² + (80.4 - 78.67)²+ (78.1 - 78.67)²+( 72.0 - 78.67)2/ 6 - 1

= 5.886047531

= 5.89

The confidence interval is calculated as

= μ ± z (σ/√N)

= 78.67 ± 1.645(5.89/√6)

= 78.67 ± 3.9555380987

The 90% confidence interval

is :

78.67 + 3.9555380987 = 82.625538099

78.67 - 3.9555380987 = 74.714619013

Therefore, the confidence interval is approximately between

(74.71, 82.63)

3 0

3 years ago

You started this year with $458 saved and

vovangra [49]

Answer:

s = 14m + 458

Step-by-step explanation:

current amount = 458

14 per month

s = 14m + 458

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1 year ago

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Lyudmila bought a CD player for 25% off the regular price of $179.99. How much did she save? How much did she pay?

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She paid $134.99 for the CD PLAYER

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3 years ago