Unit Test — Cumulative exam Answers

Which is the initial value that shrinks an exponential growth function by 50%?

On a coordinate plane, a dashed straight line has a positive slope and goes through (negative 3, negative 3) and (3, 1). Everything below and to the right of the line is shaded.

Which function represents exponential decay?

A rectangular bird feeder costs $18.00. A cylindrical bird feeder costs $24.00. The expected cost to keep the rectangular bird feeder filled is $3.00 per week. The expected cost the keep the cylindrical bird feeder filled is $2.00 per week. The equation below models the break-even point.18 + 3x = 24 + 2x What does x represent?

On a coordinate plane, solid circles appear at the following points: (negative 3, negative 3), (negative 3, 2), (1, 1), (2, negative 2), (3, 4), (4, negative 2).

Which is equivalent to ?

Which best describes the relationship between the successive terms in the sequence shown?9, –1, –11, –21, …

Which is equivalent to ?

On a coordinate plane, a dashed straight line has a negative slope and goes through (0, 3) and (2, negative 1). Everything to the left of the line is shaded.

Which of the following expresses as a fraction in simplest form?

The price of grapes at the grocery store is $1.44 per pound. There are approximately 0.45 kilograms in a pound. To the nearest cent, what is the price of grapes in dollars per kilogram?

Why is the product of a rational number and an irrational number irrational?

Which explains why the graphs of geometric sequences are a series of unconnected points rather than a smooth curve?

A family uses 12,986.64 Swiss francs per year to pay a mortgage that requires US dollars. Approximately how much, in US dollars, does the family spend per month on the mortgage?1 US dollar = 0.9019 Swiss francs1 Swiss franc = 1.11 US dollar

The amount of potential energy, P, an object has is equal to the product of its mass, m, its height off the ground, h, and the gravitational constant, g. This can be modeled by the equation P = mgh.

A coordinate plane with a line passing through points at (0, negative 2) and (4, negative 1).

Over which interval are the exponential and linear function approximately the same?

Bianca wrote the steps for her solution to the equation 2.3 + 8(1.3x – 4.75) = 629.9. She left out the description for the last step.What is the missing step of her solution?

Martin has a combination of 33 quarters and dimes worth a total of $6. Which system of linear equations can be used to find the number of quarters, q, and the number of dimes, d, Martin has?

The function f(x) is shown on the graph.