Determine the order of the matrix.
?
?
A. 3 × 3
B. 2 × 2
C. 3 × 1
D. 2 × 3
E. 3 × 2
Answer: D
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Use quadratic regression to model the following data. Round your answers to two decimal places, if necessary. ? x 0 10 12 23 31 y 4 12 18 11 3?
A. ?
B. ?
C. ?
D. 
Write in decimal notation.Three hundred ninety one thousandths
A. 0.0391 B. 0.00391 C. 0.391 D. 300.91
Solve.The function A = A0e-0.0077x models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. If 900 pounds of the material are initially put into the vault, how many pounds will be left after 80 years?
A. 506 lb B. 486 lb C. 413 lb D. 400 lb
Find the probability.When a single card is drawn from an ordinary 52-card deck, find the probability of getting a heart.
A. 
B. 
C. 
D. 