What does semicolon mean in math

Tom is the deli manager at a grocery store. He needs to schedule employee to staff the deli department for no more that 260 person-hours per week. Tom has one part-time employee who works 20 person-hours per week.

2 significant digits for 8.45

What are the domain and range of the logarithmic function f (x) = log7x?

Which number is a perfect cube? A) 4 B) 16 C) 24 D) 64

Prove that pi is irrational

5 Connie is working to earn $200. She earns $25 mowing her grandmother's lawn and $60 for a day of housecleaning. Which decimal represents the part of the money Connie still needs to earn and why? A 0.575 B 0.115 C 0.425 D 0.85

A farmer sells 9.7 kilograms of apples and pears at a farmer's market. 1/4 of the weight is apples and the rest is pears. How many kilograms of pears did she sell at the farmer's market What is the fraction

An penguin is 45 inches tall. It is 24 inches taller than a rockhopper penguin. Write and solve an equation to find the height of a rockhopper penguin. Is your answer reasonable? Explain.

Kyra observed that 85% of the students at a library liked reading mystery stories. If 30 students at the library did not like reading mystery stories, the number of students at the library who liked mystery stories was.

Two lines intersect and two of the vertical. angles measure 37 what is the measure of the other two vertical angles