Answer:
Option E
Step-by-step explanation:
This survey will not be reliable as it is chosen for convenience; the first 120 students to arrive in school on a particular morning and this collection of individuals may not be a representative of the population. The study may become biased because it does not take into account the latecomers among the students which might have been changed the study from systematically favoring certain outcomes.
Answer:
From what I can see of the problem, you CANNOT solve for the half-life of U 235 AND then solve for the length of time to determine the 20% decay.
U-235 half-life is 704,000,000 years. (Wikipedia)
The elapsed time formula = half-life * [log (Beginning Amount / ending amount) / log 2]
elapsed time = 7.04 x 10^8 * [log (100 % / 80%) / log 2]
elapsed time =7.04 x 10^8 * [log (1.25) / .30103]
elapsed time =7.04 x 10^8 * [0.096910 / .30103]
elapsed time = 7.04 x 10^8 * 0.321928047
elapsed time = 226,637,000 years
Step-by-step explanation:
We are asked to solve the formula
for
. Starting off, we can divide both sides by
, so we are left with only the variable
on the right-hand side. Next, we need to multiply the reciprocoal of
, which is
to both sides. This gives us
, which, when simplified, gives us
. Hope this helped and have a phenomenal day!
We know that
A markup is the ratio of Gross Profit Margin to C<span>ost
</span>so
Markup Percentage = Gross Profit Margin/Unit Cost
Gross Profit Margin=Sales Price – Unit Cost------> $39.99-<span>$6.95----> $33.04
</span>Markup Percentage = $33.04/$6.95------> 4.7540------> 475.40%
the answer is
475.40%
