It’s C)21/20 because for tan you do the opposite side over the adjacent. SOHCAHTOA (sin: opposite/hypotenuse cos: adjacent/hypotenuse tan: opposite/adjacent)
Given table:
color ----- Frequency
Red ------ 14
Green ----- 19
Blue -------- 21
Yellow ----- 16
Number of process repeated (trials) = 70 times
Probability (event) = number of times the event occurs / total number of trials
From the table we can see that the number of times she pick the blue marble is 21
Probability of picking a blue marble on next try =
= 
To calculate this probability is often easier to calculate the complement
the prob that we are looking for is 1-P(No salt packed in dinner)
Note: No salt packed with dinner is the complement event of having salt packed within
so let's find this probability
He is what we know
if John packs 4/45 chance no salt included
if Sue packs 3/70 chance no salt
if Marry packs 2/25 No salt
We are looking into probability is the sum (note these events are disjoint)
final result should be 1- that sum
Hi!
y = 16
x = 32
<h3 /><h3>
In 30-60-90 triangles, the hypotenuse is double the length of the shortest leg, and the longer leg is
times the shorter leg.</h3>
We are given the longest leg. To find the shortest leg, we must divide the longest leg value by 

The radicals cancel out and we are left with 16.
The length of y (the shortest leg) is 16.
Now, we also know that the hypotenuse is double the shortest leg. The shortest leg is 16, so if we double that, it's 32.