Unit 4, Lessons 5-7

The table shows the monthly revenue of a business rising exponentially since it opened an online store.

Write an equation to represent the revenue, R, as a function of months, m, since the online store opened.

Tags

CCSS.HSF.LE.A.2

At 7 a.m., a colony of 100 bacteria is placed on a petri dish where the population will triple every 6 hours.

Which statement is NOT not true about the bacteria population?

• When the bacteria population reaches 900, 12 hours have passed since the colony was placed on the petri dish.

• Three hours after the colony is placed on the petri dish, there are about 173 bacteria in the colony.

• Three hours after the colony is placed on the petri dish, there are 200 bacteria.

• 9

• 1.5

• 3

Tags

CCSS.HSF-IF.C.8B

A population of 1,500 insects grows exponentially by a factor of 3 every week. Select all equations that represent or approximate the population, p, as a function of time in days, t, since the population was 1,500.

Tags

CCSS.HSF.LE.A.2

The tuition at a public university was $21,000 in 2008. Between 2008 and 2010, the tuition had increased by 15%. Since then, it has continued to grow exponentially.

Which statement does NOT describe the growth in tuition cost?

• The tuition cost increased 7.5% each year.

• The tuition cost increased about 7.2% each year.

• The tuition cost roughly doubles in 10 years.

The half-life of carbon-14 is about 5,730 years. A fossil had 6 picograms of carbon-14 at one point in time. Which expression describes the amount of carbon-14, in picograms, t years after it was measured to be 6 picograms.

Tags

CCSS.HSF.LE.A.2

Nickel-63 is a radioactive substance with a half-life of about 100 years. An artifact had 9.8 milligrams of nickel-63 when it was first measured. Write an equation to represent the mass of nickel-63, in milligrams, as a function of t, time in years.

Tags

CCSS.HSF.LE.A.2

Nickel-63 is a radioactive substance with a half-life of about 100 years. An artifact had 9.8 milligrams of nickel-63 when it was first measured. Write an equation to represent the mass of nickel-63, in milligrams, as a function of d, time in days.

Tags

CCSS.HSF.LE.A.2