Answer is C. The half of the number is 175
Answer:
first one is the right answer
A rectangular prism is just a shape that looks like a brick.
If you think about a brick for a few seconds, you'll realize
that it has
-- 2 faces of (length by width)
-- 2 faces of (length by height)
and
-- 2 faces of (width by height).
The dimensions of the brick in question 6 are 8ft, 3ft, and 5ft.
So it has
-- 2 faces of 8ft by 3ft
-- 2 faces of 8ft by 5ft
and
-- 2 faces of 3ft by 5ft .
Can you take over and complete it now ?
Odd numbers are of the from a(n)=a+d(n-1) where a=1 and d=2 so
a(n)=1+2(n-1)=2n-1 and we need the number of odds in the range 1 to 38
2n-1≤38
2n≤39
n≤19.5, so there are 19 odd numbers in [1,38]
And since Julie bet on two even numbers as well, the probability of getting an odd number or the two evens she picked is:
(19+2)/38
21/38
