25. Best President In a sample of 2016 U. S. adults, 383 said Franklin Roosevelt
was the best president since World War II. Two U. S. adults are selected at
random without replacement. (Adapted from Harris Interactive)
(a) Find the probability that both adults say Franklin Roosevelt was the best
president since World War II.
(b) Find the probability that neither adult says Franklin Roosevelt was the
best president since World War II.
(c) Find the probability that at least one of the two adults says Franklin
Roosevelt was the best president since World War II.
(d) Which of the events can be considered unusual? Explain.

pi x^2

step-by-step explanation:

pi times x squared

correct answer is c. just did it

step-by-step explanation:

e^-kt = n/n0 = 0.79  

-kt = ln 0.79  

t = - ln 0.79/0.0001  

= 2357 years

step-by-step explanation:

step by step resolutions

1) n+n+1+n+2=51

3n+3=51

3n=48

n=16

the three numbers are 16, 17 and 18.

2) x+15=4x

3x=15

x=5

radha is now 5 years old

3) the two digits are x and y.

y=3x

(10x+y)+(10y+x)=88

y=3x

11x+11y=88

y=3x

x+y=8

x+3x=8

x=2

the original number can be either 28 or 82.

4) n+(n+2)+(n+4)=48

3n+6=48

3n=42

n=14

the numbers are 14, 16 and 18.

5) y=x+3

10y+x+10x+y=143

y=x+3

11x+11y=143

y=x+3

x+y=13

x+x+3=13

2x=10

x=5

the original number can be 57 or 75.

hope this !