(1 point) a group of 20 hunters wait for ducks to fly by. when a flock of ducks flies overhead, the hunters all fire at the same time, each selecting a target at random and independently of the others. if each hunter independently hits his target with probability 0.5, and if all misses do not hit other ducks, what is the expected number of ducks that will be hit? assume that the number of ducks in a flock is a poisson random variable with mean 5 e[n = (hint: your final answer will involve a sum; you may want to approximate it with a partial sum. if you do this, be sure to include at least 8 terms.)

Which values for a and b will create infinitely many solutions for this system of equations? ax-y=8 2x+y=b

Aregular hexagon rotates counterclockwise about its center. it turns through angles greater than 0° and less than or equal to 360°. at how many different angles will the hexagon map onto itself?

Barbara has a good credit history and is able to purchase a car with a low-interest car loan. she co-signs a car loan for her friend jen, who has poor credit history. then, jen defaults on the loan. who will be held legally responsible by the finance company and why? select the best answer from the choices provided. a. barbara will be held legally responsible because she has a good credit history. b. jen will be held legally responsible because she drives the car. c. barbara will be held legally responsible because she is the co-signer. d. jen will be held legally responsible because she has a poor credit history. the answer is a