During the day sam spent $4.85 on lunch he also bought 2 books for $7.95 each at the end of the day he had $8.20 left. how much money did he start with

Scale factor of 2 is used to enlarge a figure as shown below the area of is 18 in.²

The train station clock runs too fast and gains 5 minutes every 10 days. how many minutes and seconds will it have gained at the end of 9 days?

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.