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Bellringer 7.3

Last updated 5 months ago

7 Nsɛmmisa

1

1

Asemmisa {{asɛmmisaAhyɛnsode}}

2.

An initial investment of $1000 is appreciated for 7 years in an account that earns 5% interest, compounded annually. Find the amount of money in the account at the end of the period.

1

1

1

Asemmisa {{asɛmmisaAhyɛnsode}}

5.

A sample of 250 grams of radioactive substance decays at a rate of 34% per year. Write the equation for radioactive decay of this substance.

1

1

Asemmisa {{asɛmmisaAhyɛnsode}}

1.

Without graphing, determine whether 16(\frac{3}{2})^x represents exponential growth or exponential decay.

exponential growth

exponential decay

Asemmisa {{asɛmmisaAhyɛnsode}}

3.

The number of dislocated electric impulses per cubic inch in a transformer increases when lightning strikes by D(x) = 4900(2)^x where x is the time in milliseconds of the lightning strike. Find the number of dislocated impulses at x = 0 and x = 4.

4900;\ 19,600

9800;\ 78,400

4900;\ 39,200

4900;\ 78,400

Asemmisa {{asɛmmisaAhyɛnsode}}

4.

Identify y=0.32(0.99)^x as modeling either exponential growth or exponential decay. What percent of increase or decrease does the function model?

exponential growth; 99% increase

exponential decay; 1% increase

exponential growth; 99% decrease

exponential decay; 1% decrease

Asemmisa {{asɛmmisaAhyɛnsode}}

6.

Choose the correct equation for the graph shown.

y=-2^{\left(x+3\right)}+1

y=-2^{\left(x-3\right)}-1

y=2^{\left(x-3\right)}+1

y=-2^{\left(x+3\right)}-1

y=-2^{\left(x-3\right)}+1

Asemmisa {{asɛmmisaAhyɛnsode}}

7.

The graph of y = 5e^x is translated 3 units to the right, reflected in the y-axis, and then translated 7 units downward. What is the equation of this transformed function?