Question 1 (10 point)
What value would make the statement true?
(2x + 5i) (2x – 5i) = 4x²+?
A.25
B.-50
C.-25
D.10

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Apatient is to be given 35 milligrams of demerol every 4 hours. you have demerol 50 milligrams/milliliter in stock. how many milliliters should be given per dose?

Consider a bag that contains 220 coins of which 6 are rare indian pennies. for the given pair of events a and b, complete parts (a) and (b) below. a: when one of the 220 coins is randomly selected, it is one of the 6 indian pennies. b: when another one of the 220 coins is randomly selected (with replacement), it is also one of the 6 indian pennies. a. determine whether events a and b are independent or dependent. b. find p(a and b), the probability that events a and b both occur.