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Mila [183]
3 years ago
10

Find the perimeter of a rectangle that is 2 and 1/2 yards by 4 and 1/2 yards

Mathematics
1 answer:
Travka [436]3 years ago
7 0
The answer is 14. First, get both numbers and add them twice (2.5+2.5+4.5+4.5) or (2.5 * 2 + 4.5 * 2). Then you should get 2 numbers which are 9 and 5. Then it should be 14, which is the answer.
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Suppose ACT Reading scores are normally distributed with a mean of 21.4 and a standard deviation of 5.9. A university plans to a
Yakvenalex [24]

Answer:

29.2

Step-by-step explanation:

Mean = 21.4

Standard deviation = 5.9%

The minimum score required for the scholarship which is the scores of the top 9% is calculated using the Z - Score Formula.

The Z- score formula is given as:

z = x - μ /σ

Z score ( z) is determined by checking the z score percentile of the normal distribution

In the question we are told that it is the students who scores are in the top 9%

The top 9% is determined by finding the z score of the 91st percentile on the normal distribution

z score of the 91st percentile = 1.341

Using the formula

z = x - μ /σ

Where

z = z score of the 91st percentile = 1.341

μ = mean = 21.4

σ = Standard deviation = 5.9

1.341= x - 21.4 / 5.9

Cross multiply

1.341 × 5.9 = x - 21.4

7.7526 = x -21.4

x = 7.7526 + 21.4

x = 29.1526

The 91st percentile is at the score of 29.1526.

We were asked in the question to round up to the nearest tenth.

Approximately, = 29.2

The minimum score required for the scholarship to the nearest tenth is 29.2 .

6 0
3 years ago
- Mary earns an hourly wilge of $13 plus a $90
SIZIF [17.4K]

Answer:

39 hours

Step-by-step explanation:

Mary earns an hourly wage of $13

plus a $90 bonus.

Her total paycheck shows she received $597

Subtracting the bonus we get;

$597 - $90 = $507

1 hour -> she gets $13

how many hours will she get $507

Cross multiplying gives;

\frac{507}{13}  * 1 = 39 hours

8 0
3 years ago
Read 2 more answers
Find the LCD for the following pair of fractions.<br> 1/5<br> and<br> 1/2
Katarina [22]
The LCD would the 10 since that is the lowest multiple that they both have in common.
7 0
2 years ago
Help me on math please please pleaseeeeee
zzz [600]

Answer:

First row - X+X-2

Second row- x +2-x

Step-by-step explanation:

5 0
2 years ago
Anthony Papantonis, owner of Nauset Construction, is bidding on two projects, A and B. The probability that he wins project A is
Fudgin [204]

Answer:

a) the probability of winning A and B is 0.4 (40%)

b) the probability of not winning either project is 0.1 (10%)

Step-by-step explanation:

if 2 events are independent then

P(A∩B)=P(A)*P(B)

where

P(A)= probability of winning project A

P(B)= probability of winning project B

P(A∩B)= probability of winning projects A and B

replacing values

P(A∩B)=P(A)*P(B) = 0.50 * 0.8 = 0.4

b) since

P(A∪B) = P(A) + P(B) - P(A∩B) = 0.50 + 0.8 - 0.4 = 0.9

where

P(A∪B) =  probability of winning A or B

therefore

probability of not winning either project = 1 - P(A∪B) = 1 - 0.9 = 0.1 (10%)

5 0
2 years ago
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