The information below shows the number of hours Sarah worked out each month. March = 2 1/4 April = 2.6 May = 4 1/2 June = 2 2/5 July = 4.9   How much more did Sarah workout in June and July than in March and April

4 / 4 100% 17. Multiply and simplify if possible: V2x' •V10x

Have you ever heard of Chamberlain's formula, which claims to be a model that tells you how many years you should drive your present car before you buy a new one? If y is this number of years, then Chamberlain's formula reads GMC (G - M)DP where G is the new car's gas mileage, M is your present car's gas mileage, C is the cost in dollars of the new car, D is the number of miles you drive in a year, and P is the dollar price of gasoline per gallon. y = Suppose the new car's gas mileage is 36 mi/gal, the old car's gas mileage is 16 mi/gal, the price of the new car is $23,000, you drive 10,000 mi/year, and the cost of gasoline is $4.00/gal. How many years should your old car have been driven to justify buying the new one? yr

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Worried about going over her storage limit, Wendy monitored the number of undeleted voicemail messages stored on her phone each day. Voicemail messages on Wendy's phone Day Voicemail messages Tuesday 19 Wednesday 8 Thursday 13 Friday 9 Saturday 22 According to the table, what was the rate of change between Thursday and Friday? voicemail messages per day

For Chapter 2 through Chapter 14, the Cumulative Review Exercises include topics from preceding chapters. For this chapter, we present a few calculator warm-up exercises, with expressions similar to those found throughout this book. Use your calculator to find the indicated values . 1. Birth Weights Listed below are the weights (grams ) of newborn babies from Albany Medical Center Hospital . What value is obtained when those weights are added and the total is divided by the number of weights? (This result, called the mean , is discussed in Chapter 3.) What is notable about these values, and what does it tell us about how the weights were measured? 36001700 400039003100 3800 22003000

A certain city's power company charges their residents for electricity usage on a daily basis. There is a basic charge of 11.57 cents. For each day the first 10 kWh cost 4.81 cents per kWh and any additional kWhs are 9.69 per kWh. (A kWh, or kilowatt-hour, is a unit of energy.) (a) Complete the following table using the information provided above. kWhkWh 0 5 10 15 20 cost (dollars)cost (dollars)           kWhkWh 25 30 35 40 cost (dollars)cost (dollars)         (b) We can define a piecewise function f(x)f(x) where xx is the kWh used in a day and f(x)f(x) is the cost, in dollars. This function would have the form   f(x)={g(x)h(x)ififx∈Ax∈Bf(x)={g(x)ifx∈Ah(x)ifx∈B What functions g(x)g(x) and h(x)h(x) make up the piecewise function f(x)f(x)? g(x)=g(x)= for A = h(x)=h(x)= for B = Hint: A and B are intervals. If an interval uses ±∞±∞ write inf or -inf . (c) Using the above function, what is the cost of 26 kWh? dollars. (d) For 3 dollars, what is the maximum kWh usage for one…

If 3/x – 3 + 10 = 22, what is the value of x – 3 ? %3D

The US Census Bureau determined that from 1910 to 2010 the US population increased by approximately 1.5% each year. The 13th US Census (conducted in 1910) determined that the US population was 92.228 million people. What is the 6-year growth factor?    What was the population of the United States in 1916 ?     The population in 1966  is how many times as large as the population in 1960 ?    Determine in what year the population of the United States was 141.04 million people.

The population of Alabama is about 4.3 million. They have a rate of decline of 3% a year. What will be Alabama's population in 20 year a O b Oc Od 2.41 million 2.45 million 2.33 million 2.34 million