SHOW WORK! PLEASE HELP ASAP IF YOU CAN :(A stack of index cards is 3/4 of an inch tall. If each card is 3/160 of an inch thick, how many index cards are in the stack?
so what you have to do first is simplify into variables
S=A 3/4 stack of index cards
first you can do this with a calculator, divide 3/4 of an inch by 3/160 of an inch.
Here is my work shown :)
Male the division into multiplication and swap the numbers in 3/160 to 160/3
3/4 x 160/3
For fraction multiplication, multiply the numerators and then multiply the demoninators to get
3 x 160/4 x 3= 480/12
Divide 480 by 12 which is forty
there you go :) sorry if the answers are messed up and there are spelling errors. but in conclusion the answer is 40
By the way, awesome pfp, I just started watching Toilet Bound Hanako earlier tonight and it's very good so far
PhD’s in Engineering. The National Science Foundation reports that 70% of the U.S. graduate students who earn PhD degrees in engineering are foreign nationals. Consider the number Y of foreign students in a random sample of 25 engineering students who recently earned their PhD.a) Find the probability that there are exactly 10 foreign students in your sample – use equation for thisb) Find the probability that there are less than or equal to 5 foreign students in your sample andc) Find the mean and standard deviation for Y
c) Mean = 17.5
S.D. = 2.29
We can model this as a binomial random variable with n=25 and p=0.7.
The probability that k students from the sample are foreign students can be calculated as:
a) Then, for Y=10, the probability is:
b) We have to calculate the probability P(Y≤5)
c) The mean and standard deviation for this binomial distribution can be calculated as:
The location of Sonia's school and home are plotted on the coordinateplane shown. What are the coordinates (x, y) of her school?