Answer:
8%
Step-by-step explanation:
Length = 30 cm
It increases by 10 %
The increase is 30*.10 = 3
New length = old length + increase
30+3
33 cm
Width =20
It increases by 5%
The increase is 20 *.05 = 1
New width = old width + increase
=20+1
21
Old perimeter = 2(l+w) = 2(30+20) = 2(50) = 100
New perimeter = 2(l+2) = 2(33+21) =2(54) = 108
Percent increase = (new - old)/old * 100%
= (108-100)/100 * 100%
= 8/100*100%
=8%
Answer:
0.3085,0.2417,0.0045
Step-by-step explanation:
Given that X, the amount of money spent at shopping centers between 4 P.M. and 6 P.M. on Sundays has a normal distribution with mean $85 and with a standard deviation of $20.
X is N(85, 20)
To convert into std normal variate we use the following formula
a) the probability that he has spent more than $95 at the mall
=
b. the probability that he has spent between $95 and $115 at the mall
=
c. If two shoppers are randomly selected, what is the probability that both shoppers have spent more than $115 at the mall
=product of two probabilities since independent
=
Answer:A
Step-by-step explanation:
-3 to the left and up 4
Answer: 4. A
5. C
6. B
Step-by-step explanation: