P(t) = 250 + 10t
The population of snow leopards in a certain area can be modeled by the function P defined above, where P(t) is the population t years after 1990 . Of the following, which is the best interpretation of the equation P(30) = 550 ?

If Mosteller’s and Current’s formulas give the same estimate for A, which of the following expressions is equivalent to  ?
Mosteller’s formula: A = 
Current’s formula: A = 
The formulas above are used in medicine to estimate the body surface area A, in square meters, of infants and children whose weight w ranges between 3 and 30 kilograms and whose height h is measured in centimetres.

Mosteller's equation: "A=sqrt(hw)/60" The current equation is A=(4+w)/30. In medicine, the formulas mentioned above are used to calculate the body surface area A, in square meters, of newborns and kids whose weights (w) range from 3 to 30 kilograms and whose heights (h) are measured in centimeters.

The graph above shows the temperature in a room during a day when the thermostat malfunctioned. For which of the following two-hour periods was difference between the maximum and minimum temperatures greatest?

Ryan is comparing five different hat balers (machines that make bales of hay). The bales made are all in the shape of a cylinder, as shown in the figure.
The price of each hay baler and the dimensions of the bales of hay it makes are shown in the table given.
Which of the following is closest to the percent by which the price of hay baler E exceeds the price of hay baler C?
   

Based on Current’s formula, what is w in terms of A ?
Mosteller’s formula: A = 
Current’s formula: A = 
The formulas above are used in medicine to estimate the body surface area A, in square meters, of infants and children whose weight w ranges between 3 and 30 kilograms and whose height h is measured in centimetres.

Ryan is comparing five different hay balers (machines that make bales of hay). The bales made are all in the shape of a cylinder, as shown in the figure.
The price of each hay baler and the dimensions of the bales of hay it makes are shown in the table given.
Of the following, which ratio is closest to the width of bales made by hay baler A to the width of bales made by the hay baler D?
   

The scatterplot above shows data for ten charities along with the line of best fit. For the charity with the greatest percent of total expenses spent on programs, which of the following is closest to the difference of the actual percent and the percent predicted by the line of best fit?

Expenses are sums of money spent on goods or services. It is defined as the amount of money required to obtain something."It takes money to make money," as the adage goes. Supplier payments, employee wages, factory leases, and equipment depreciation are all everyday expenses.
For example, running a car can be costly in terms of fuel, repairs, and insurance.
Profit (P): When a product is sold for more than its cost, the seller makes a profit.
Loss (L): When a product is sold for less than its cost, the seller suffers a loss.

Which of the following expressions is equivalent to 2a² (a + 3) ?

y = 19.99 + 1.50x
The equation above models the total cost y, in dollars, that a company charges a customer to rent a truck for one day and drive the truck x miles. The total cost consists of a flat fee plus a charge per mile driven. When the equation is graphed in the xy-plane, what does the y-intercept of the graph represent in terms of the model?

WA sample of 40 fourth-grade students was selected at random from a certain school. The 40 students completed a survey about the morning announcements, and 32 thought the announcements were helpful. Which of the following is the largest population to which the results of the survey can be applied?

If a – b = 12and  = 10, what is the value of a + b ?

The figure above shows a graph with 6 regions that correspond to temperature, in degrees Fahrenheit (°F), and humidity conditions, in grams of water vapor per cubic meter of air (g/m³⁾, that will result in different snow crystal shapes when the crystals are grown in a laboratory. Based on the graph, which of the following is a combination of temperature and humidity at which prisms will be formed?

In the xy-plane above, if point F (not shown) is placed so that triangle ABC is similar to triangle , which of the following could be the coordinates of the point F ?

In the table above, the ratio of y to x for each ordered pair is constant. What is the value of k ?

If 50 one-cent coins were stacked on top of each other in a column, the column would be approximately 3 inches tall. At this rate, which of the following is closest to the number of one-cent coins it would take to make an 8-inch-tall column?

The table above shows the observed mating frequencies among a group of fruit flies raised on either a starch medium or a maltose medium. What fraction of the observed matings were between fruit flies that were raised on the same medium?