What is the sum (6x3 – 5x2 + 3x – 5) + (8x4 + 3x3 + 5x2 + x + 4)? Question 5 options: A) 8x4 + 9x3 + 4x – 1 B) 9x6 + 8x4 + 4x2 – 1 C) 8x4 – 3x3 + 10x2 – 2x + 9 D) 8x4 + 3x3 – 10x2 + 4x – 1

Find the equation using the point (4,8)

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.

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?