What is avogadro's number in chemistry in standard notation?

kiersten has 23 red balloons. Catherine has 8 times more red balloons than Spirit. How many more red balloons does catherine have than kiersten?

The angle supplementary to 87 degrees is ...

A survey found that 78% of students do their homework before 10:00 P. M. Predict how many students out of 975 do their homework before 10:00 P. M. a. about 761 b. about 78 c. about 800 d. about 13

there are 6rows of 16 chairs set up for the third grade play, in the first 4 rows two chairs on each end are reserved for teachers the rest of the chairs are for students how many chair are there for stugents?

Danica is arranging flowers for a party. On each table, t, there will be a vase of 9 flowers and 3 bowls of flowers with f flowers inside. Danica needs an additional 12 flowers for a cake topper.

What is the absolute value of |x| < 3

Many factors need to be considered when buying a car, including style, color, gas mileage, and cost. Examine these choices and determine which represents a compound event.

Bus A and Bus B leave the bus depot at 8 am. Bus A takes 25 minutes to do its route and bus B takes 35 minutes to complete its route. At what time are they both back at the bus depot together? Give your answer as a 12-hour clock tim

Which type of star system has the MOST stars? Open cluster Globular cluster Eclipsing binary Binary star system

You paid $28 in tax when you bought a $350 bike. What was the percent tax?