Melissa’s birthday is next week and she has been receiving cards in the mail with different amounts of money. she has received 5 cards with the following amounts: $10, $20, $ 25, $30, $40. if melissa receives one more card in the mail with $25, which of the following will happen?
the standard deviation will
select a value
a) decrease.
b) increase.
c) stay the same.

Arunning track in the shape of an oval is shown. the ends of the track form semicircles. a running track is shown. the left and right edges of the track are identical curves. the top and bottom edges of the track are straight lines. the track has width 56 m and length of one straight edge 130 m. what is the perimeter of the inside of the track? (π = 3.14) 260.00 m 347.92 m 372.00 m 435.84 m

The number of nails of a given length is normally distributed with a mean length of 5.00 in, and a standard deviation of 0.03 in. find the number of nails in a bag of 120 that are less than 4.94 in. long.

Solve the system of equations y= 3/2 - 1, -x+ y =-3