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wel
3 years ago
13

A rectangular swimming pool has a length of l yards and a width 5 yards less than its length. How much does it cost to border th

e outside of
the pool using 1-yard square tiles that cost $4 each?
o (161 – 40) dollars
(161 – 24) dollars
(42–6) dollars
(161 - 20) dollars
8 of 15 answered
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Mathematics
1 answer:
horsena [70]3 years ago
8 0

Answer:

i need a bad bleep

Step-by-step explanation:

lol

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The number of "destination weddings" has skyrocketed in recent years. For example, many couples are opting to have their wedding
crimeas [40]

Answer:

Step-by-step explanation:

Mean = (29.7 + 29.4 + 31.7 + 29.0 + 29.1 + 30.5 + 29.1 + 29.8)/8 = 29.7875

Mean = 29.7875 × 1000 = $29787.5

Standard deviation = √(summation(x - mean)²/n

n = 8

Summation(x - mean)² = (29.7 - 29.7875)^2 + (29.4 - 29.7875)^2 + (31.7 - 29.7875)^2 + (29.0 - 29.7875)^2 + (29.1 - 29.7875)^2 + (30.5 - 29.7875)^2 + (29.1 - 29.7875)^2 + (29.8 - 29.7875)^2 = 5.88875

Standard deviation = √(5.88875/8

s = 0.88

s = 0.88 × 1000 = $880

a) We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean

For the null hypothesis,

H0:µ ≤ 30000

For the alternative hypothesis,

H1:µ > 30000

This is a right tailed test.

b) The decision rule is to reject the null hypothesis if the significance level of 0.05 is greater than the probability value. If it is otherwise, we would fail to reject the null hypothesis.

c) Since the number of samples is small and no population standard deviation is given, the distribution is a student's t.

Since n = 8

Degrees of freedom, df = n - 1 = 8 - 1 = 7

t = (x - µ)/(s/√n)

Where

x = sample mean = 29787.5

µ = population mean = 30000

s = samples standard deviation = 880

t = (29787.5 - 30000)/(880/√8) = - 0.68

We would determine the p value using the t test calculator. It becomes

p = 0.26

d) Since alpha, 0.1 < the p value, 0.26, then we would fail to reject the null hypothesis.

6 0
3 years ago
HURRY UP PLEASE I RLLY NEED THIS........ On a coordinate plane, the field is 1 unit up and 1 and one-half units to the left. The
nikitadnepr [17]

Answer:

(-1/2, 1)

Step-by-step explanation:

it's just coordinate planed

3 0
2 years ago
Read 2 more answers
If the triangle measure 180 degrees. What is the missing angle?
max2010maxim [7]

Answer:

116

Step-by-step explanation:

36+28=64

180-64=116

3 0
3 years ago
Read 2 more answers
Charles is reading about computers. He learns that a computer processor can perform one command in approximately 0.000000016 n
Andru [333]
To convert our number to scientific notation, we are going to move the decimal point to the right until we have only one non-zero digit to the left of the decimal point, and then, we are going to multiply that number by a negative power of 10 equal to the number of times we moved the decimal point to the right:
<span>
Our number is 0.000000016, so we need to move the decimal point 8 times to the right to have </span>only one non-zero digit to the left of the decimal point (1.6). Since we moved the decimal point eight times to the right, we are going to multiply 1.6 by y a negative power of 10 equal to the number of times we moved the decimal point to the right i.e. 10^{-8}.
So 0.000000016 expressed in scientific notation is 1.6x10^-8, or in calculator notation 1.6E-8

We can conclude that the correct answers are <span>1.6E-8 and </span><span>1.6 × 10-8</span>
3 0
2 years ago
Read 2 more answers
Jim rented a truck for one day. There was a base fee of $18.95 , and there was an additional charge of 78 cents for each mile dr
erastovalidia [21]

18 - 15.95 = 2.05

2.05 divided by 71 =

2.9 miles

5 0
3 years ago
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