I’m pretty sure it’s D. 84.4
The first one will flash at every 30 sec and the second one at 20 sec. The second one will go like 1- 4- 8 and then to 12. By the time the second one will reach first at 6 and then on 12. So, after every 1 minute they will flash together.
Answer:
Sample size shouldbe atleast 60
Step-by-step explanation:
Given that PTC is a substance that has a strong bitter taste for some people and is tasteless for others. The ability to taste PTC is inherited and depends on a single gene that codes for a taste receptor on the tongue. Interestingly, though the PTC molecule is not found in nature, the ability to taste it correlates strongly with the ability to taste other naturally occurring bitter substances, many of which are toxins.
Proportion of Italians who taste PTC =0.75
Margin of error <0.11
Confidence level = 95%
Std error of proportion = 
Margin of error =
<0.11

Sample size shouldbe atleast 60
Answer:
hope this helps
Step-by-step explanation:
If you break the fraction into a whole number it would be 5 and 10 minus 5 is 5. so x=5