Find the value of c that would make x2 + cx + 144 a perfect square.
a) 6
b) 12
c) 24
d) 72

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

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.