Answer:
45% of the rock is mica
Step-by-step
10% + 45% = 55%. 100% - 55% = 45%
Answer:
21) 2 x 11
23) 2 x 2 x 2 x 3
25) 3 x 5
27) 2 x 2 x 5
29) 3 x 7
Step-by-step explanation:
This is a Bayes Theorem Problem
P(oil | negative test) P(negative test)= P(negative test | oil) P(oil)
P(oil | negative test) = P(negative test | oil) P(oil) / P(negative test)
P(oil | negative test) =P(negative test | oil) P(oil) / ( P(negative test | oil) P(oil) + P(negative test | no oil) P(no oil) )
We're given the prior probability of oil, P(oil)=.45, so P(no oil)=.55
We given P(negative test | no oil) = 0.80, so P(negative test | oil) = .20

Choice A
Ok, it is asking for the suface area of a rectangular prism - 1 base side.
So lets find the sides.
2(wl+hl+hw) l is length, w is width, h is height
wl + 2hl + 2hw is our formula
0.75 feet is 9 inches
9*(13) + 2(2)(13) + 2(9)(2)
= 117 + 53 + 36
= Your answer is 206
Please award me the brainliest if I am correct.
Thank You.