Multiplication Word Problem

A scientist is studying the growth of bacteria in a lab. If the number of bacteria doubles every hour, and there are initially 100 bacteria, how many bacteria will there be after 5 hours?

• 200

• 400

• 1600

• 3200

A biologist is observing a population of rabbits. If the population triples every month, and there are initially 50 rabbits, how many rabbits will there be after 3 months?

• 150

• 450

• 1350

• 4050

A chemist is mixing solutions in a lab. If the concentration of a solution is multiplied by 4 when a catalyst is added, and the initial concentration is 2 M, what is the final concentration?

• 4 M

• 6 M

• 8 M

• 10 M

Tags

NGSS.HS-PS1-5

A physicist is studying the speed of a car. If the speed is multiplied by 1.5 when a turbocharger is used, and the initial speed is 60 km/h, what is the final speed?

• 70 km/h

• 80 km/h

• 90 km/h

• 100 km/h

An ecologist is studying the growth of a tree. If the height of the tree is multiplied by 2 every year, and the initial height is 1 meter, what is the height after 3 years?

• 2 meters

• 4 meters

• 6 meters

• 8 meters

A physicist is conducting an experiment with springs. If the force applied to a spring is multiplied by 3, and the initial force is 10 N, what is the final force?

• 20 N

• 30 N

• 40 N

• 50 N

A geologist is studying rock formations. If the density of a rock is multiplied by 2 when pressure is applied, and the initial density is 3 g/cm³, what is the final density?

• 4 g/cm³

• 5 g/cm³

• 6 g/cm³

• 7 g/cm³

A botanist is studying plant growth. If the number of leaves on a plant is multiplied by 5 every month, and there are initially 4 leaves, how many leaves will there be after 2 months?

• 20

• 40

• 60

• 80

A physicist is studying the energy of a system. If the energy is multiplied by 2 when a certain process occurs, and the initial energy is 50 J, what is the final energy?

• 75 J

• 100 J

• 125 J

• 150 J

Tags

NGSS.MS-PS3-5

A chemist is studying reaction rates. If the rate of a reaction is multiplied by 3 when temperature is increased, and the initial rate is 2 mol/s, what is the final rate?

• 4 mol/s

• 5 mol/s

• 6 mol/s

• 7 mol/s

Tags

NGSS.HS-PS1-5