Hello :
(sec²x - 1) / sec²x = (sec²x / sec²x) -1/sec²x
= 1 -1/sec²x
= 1- (1/secx)²
= 1 -cos²x
= sin²x
So for the first one what you did was wrong as in wrong formula.
Radius is 5cm as it is given and diameter is double the radius which is 10.
So r=5
And D=10.
For the second one the diameter is 16cm as it is given and radius is half the diameter,so half of 16 is 8cm right?
So r=8
And D=16
Answer:77 cents Clara found 77 cents bc you just need to add up the cents and you have it
Whenever the questions asks for the probability and has "or" you have to add the two probabilities. In the same way, "and" implies multiplication. Therefore, the probability that someone swims is:

Probability that someone runs:

Thus, if you add them:

So, the probability that someone swims <em>or</em> runs is
1/2 or
50%.
Answer:
-35
Step-by-step explanation: