In a grade 7 class, 1/5 of the students have two pets and 1/20 have three pets. a) Estimate the fraction of the class that either has two or three pets.

b) Calculate the fraction of the class that has either two or three pets.

c) How many students do you think are inthe class? Why?

Complete the statements about the system of linear equation respresented by the tables the equation respented the left table is

Suppose your school costs for this term were $4900 and financial aid covered 3/4 of that amount. how much did financial aid cover? and how much do you still have to pay?

The fraction of defective integrated circuits produced in a photolithography process is being studied. a random sample of 300 circuits is tested, revealing 17 defectives. (a) calculate a 95% two-sided confidence interval on the fraction of defective circuits produced by this particular tool. round the answers to 4 decimal places. less-than-or-equal-to p less-than-or-equal-to (b) calculate a 95% upper confidence bound on the fraction of defective circuits. round the answer to 4 decimal places. p less-than-or-equal-to