
÷

First, apply the rule: a ÷

= a ×


×
Second, apply the rule:

×

=

Third, multiply 4 × 3 to get 12, and 9 × 2 to get 18.
Fourth, find the GCF of 12 and 18.
Factors of 12: 1, 2, 3, 4, 6, 12
Factors of 18: 1, 2, 3, 6, 9, 18
The GCF is 6.
Fifth, divide the numerator by the GCF.

÷ 6 = 2
Sixth, divide the denominator by the GCF.
18 ÷ 6 = 3
Seventh, rewrite your fraction.

Answer as fraction:

Answer as decimal: 0.6667
Question 1: 5/8=0.625=62.5% 13/22=about 0.59(repeats 09)=9%
22/30=about 0.73(repeats 3)=73% 12/25=0.45=45%
Store 3 had the greatest percentage of smart phones.
Question 2: 0.775/7.75%=0.775/0.0775=10
For mobile phone 3, it uses o.775 hour of battery life if 7.75% of battery is used.
Set it up as proportion. Corresponding sides matter. I am going to go from the one on the left to the one on the right.

. Cross multiply to get 96=12x-12. 108 = 12x and x = 9
Answer:
b) Is associated with motor impairment but does not cause it
Step-by-step explanation:
The study didn't explain the timeline of their findings, so we can conclude this research takes data at one time. Research that doesn't take before and after exposure data cannot be used to derive causation since we can't prove that the condition happens after the exposure. But this study still can predict association by risk ratio or odds ratio depends on the study design.