Answer:
The probability is 
Step-by-step explanation:
Given is that a fair coin is tossed 5 times in a row.
This gives total number of outcomes as = 
As its needed that heads comes exactly 2 times, so favorable outcomes are = 5C2

Solving this we get 10
Therefore, the probability of getting heads exactly 2 times is =
or

Answer:
Step-by-step explanation:
2.5 x
* 3.7 x 
add the expoents, and multiply the coefficients
2.5 * 3.7 =9.25
= 
9.25 x 
Answer:
256 ; 81
Step-by-step explanation:
(4^⅓)^12 = 4⁴ = 256
(9⁴)^½ = 9² = 81
Answer:
surface area of the triangular pyramid
=(1/2×9×7.8)+(3×1/2×9×12.3)
=35.1+166.05
=201.15 inch²