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MAXImum [283]
3 years ago
12

A company that makes​ hair-care products had 7,000 people try a new shampoo. Of the 7,000 people, 28 had a mild allergic reactio

n. What percent of the people had a mild allergic​ reaction?
Mathematics
1 answer:
makvit [3.9K]3 years ago
5 0

Answer: 0.4%

Step-by-step explanation:

First, a porportion needs to be set up.

part/whole = percent/100

28/7,000 = x/100

Second, cross multiply.

2800=7,000x

x=0.4

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Julia has 14 pounds of nuts .there are 16 ounces in one pound. how mant ounces of nuts does she have
SSSSS [86.1K]
There are 14 pounds of nuts, and each are 16 ounces.

14*16 = ?

14*16 = 224

Final answer: She has a total of 224 ounces of nuts.
8 0
3 years ago
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A human hair is approximately 40 microns (um) wide. If 1 um is equal to 10
Natasha2012 [34]

Answer:

D 40,000nm

Step-by-step explanation: 1nm/10^-9m * 10^-6/1um = 10^3 nm/um

Therefore in 40 microns there are:

40um * 10^3 nm/um = 40 * 10^3 nm = 40,000 nm

5 0
2 years ago
4(5+ab) where a=-3.5 and b-0.8
lozanna [386]

Answer:

31.2

Step-by-step explanation:

4(5 + (- 3.5 × - 0.8)

4(5 + 2.8)

4(7.8)

31.2

6 0
3 years ago
What is the explicit equation for the sequence of 25, 21, 17, 13?
OlgaM077 [116]

Answer:

You are taking away 4 each time

Step-by-step explanation:

25 - 4 = 21

21 - 4 = 17

17 - 4 = 13

13 - 4 = 9

3 0
3 years ago
Special right triangles
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Right angle is the answer I think ( not sure though )
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