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Llana [10]
3 years ago
13

8. Bob bought a pair of tennis shoes on sale

Mathematics
1 answer:
mr_godi [17]3 years ago
4 0

Answer:

20%

Step-by-step explanation:

So, I would set this up as a proportion-

72          x

90        100

Cross multiply-

100 x 72 = 7200

Divide-

7200/90 = 80

Subtract-

100 - 80 = 20

So, it is a 20% decrease

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A treatment is administered to a sample of n = 9 individuals selected from a population with a mean of µ = 80 and a standard dev
stepan [7]

Answer:

a) M =82

Step-by-step explanation:

Let´s study this as a Normal distribution.

As we know in a normal distribution the z score is = (X-μ)/(sd/sqrt(n))

where

X = mean for the taken sample = What we want to know in this problem

μ = Total population mean =80

sd= standard deviation= 12

n = sample size=9

So in this case z=( X-80)/(12/sqr(9))= (X-80)/4

also we know that the effect size taken by the machine is 0.5, which is the same as the z-score

so...

0.5 = (X-80)/4 => 0.5*4 = X-80

2+80 = X

X = 82

4 0
3 years ago
I need help.........
Otrada [13]
The first would be 4,000 and the second would be 400
3 0
4 years ago
We learned that division expressions that have the same quotient and remainder are not necessarily equal to each other explain h
olasank [31]
<span>Let's say you divide 25 by 4.  You will get a quotient 6, but have that remainder of 1.  You could also divide 37 by 6, and likewise get a quotient of 6, with a remainder of 1.  The difference is that the remainders are not truly the same.  The first remainder is 1 part out of 4, but the second remainder is 1 part out of 6</span>
6 0
3 years ago
Read 2 more answers
6.
madam [21]

Answer:

  $12.92

Step-by-step explanation:

The total being split 3 ways is ...

  $32.85 × (1 + 0.18) = $38.76

So each pays ...

  $38.76 / 3 = $12.92 . . . amount each person pays

8 0
3 years ago
Two sides of a triangle are 10 cm and 13 cm long. One of the nonincluded angle measures 95 degrees. Is it a unique triangle or m
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