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bonufazy [111]
3 years ago
8

A shirt originally cost $39.38, but it is on sale for $31.50. What is the percentage decrease of the price of the shirt? If nece

ssary, round to the nearest percent.
Mathematics
1 answer:
seraphim [82]3 years ago
5 0

Answer:

20%

Step-by-step explanation:

1. subtract the new price from the original price

39.38-31.50=7.88

2. divide the difference by the original number

7.88 ÷ 39.38=.2001

3. multiply this number by 100

(.2001)100=20%

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olga55 [171]

Answer: I think it is 5 or 4

8 0
2 years ago
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Question set 2: Many species of terrestrial tree frogs that hibernate at or near the ground surface can survive prolonged exposu
joja [24]

Answer:

0.86

Step-by-step explanation:

The z-score we need to make the comparison is given by

\bf z=\frac{-2.05-(-2)}{\sigma/\sqrt{n}}

where

\bf \sigma= the standard deviation established in the study

n = the sample size

\bf z=\frac{-2.05-(-2)}{0.3/\sqrt{42}}=-1.0801

and for the Normal distribution N(0,1) we want to find  

<em>P(X > -1.0801) </em>

By using a spreadsheet or the table attached, we find that

P(X > -1.0801) = 0.86

(See picture attached)

7 0
3 years ago
Find the tangent of both angle A and angle B. Ignore what the picture says the numbers are the same.
Elena-2011 [213]
For the angle A we have:
 tan (A) = C.O / C.A
 tan (A) = 10/24
 Simplifying we have:
 tan (A) = 5/12
 For angle B we have:
 tan (B) = C.O / C.A
 tan (B) = 24/10
 Simplifying we have:
 tan (B) = 12/5
 Answer:
 
The tangent of angles A and B is given by:
 
tan (A) = 5/12
 
tan (B) = 12/5
4 0
3 years ago
Whats -20x 50????????????
Leokris [45]

Answer:

-1,000

Step-by-step explanation:

3 0
3 years ago
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Ashley has two jobs: mowing lawns and babysitting. She earns $9 per hour mowing lawns (x) and $7 per hour babysitting (y). She a
SpyIntel [72]

Answer:

The correct answer is 9x + 7 y \geq 147 where Ashley works for x hours as lawn mower and y hours as babysitter per week.

Step-by-step explanation:

Ashley works in two different jobs namely mowing lawns and babysitting.

Let Ashley mow lawn for x hours and babysit for y hours in a week.

Ashley's earning for every hour she mow is $ 9. Total earning mowing lawn is $ 9x.

Ashley earns $7 for every hour she babysit. Total earning babysitting is $ 7y.

Total earning per week $ (9x + 7y).

Ashley's earning per week is at least $147.

∴ The required inequality to describe the above case is 9x + 7 y \geq 147.

6 0
3 years ago
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