Ray had a balance of $145 in his bank account. He then spent $15 for stationery, $50 for food, and $60 for gas. Now he has a balance of $20. After spending money on stationery, food, and gas, Ray has a  balance. He  negative or positive

has 20$ in his account
or
owes the bank 20$

What is the ratio for the surface areas of the cones shown below, given that they are similar and that the ratio of their radil and altitudes is 4: 3? 23

Anature center offer 2 guided walks. the morning walk is 2/3 miles. the evening walk is 3/6 mile. which is shorter

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.