Ataxi cab costs $1.50 for the first mile and $0.75 for each additional mile which equation could be solved to find how many miles you can travel in a taxi for $10 given that x is the number of additional miles
a| 1.5x + 0.75 = $10
b| 0.75x + 1.5 = $10
c| 1.5x - 0.75 = $10
d| 0.75x - 1.5 = $10

which is the solution of t/2.5 = -5.2

a| t= -13
b| t= -2.08
c| t=2.08
d| t=13

which expression is equivalent to 5x - 30

a| 5(x - 30)
b| 5(x-6)
c| 5x(x-6
d| x(5-30)

in a science experiment the tempature of a substance is changed from 42.f to -54.f at an average rate of -12 degrees per hour over how many hours does the change take place

a| -8 hours
b| 1/8 hours
c| 1 hours
d| 8 hours

The rate of decay of a radioactive substance depends upon the amount present initially. the mass y (mg) of the radioactive substance cobalt-60 present in a sample at time t (years) is represented by the exponential equation y=50e −0.1315 t . answer the following questions in complete sentences. 1. how does the exponential equation above compare to the equation for simple interest that is compounded continuously? explain the similarities. 2. what is the initial amount of cobalt-60 in the sample? 2. how much cobalt-60 is left after 8.4 years? show your work. 3. what would be the y-intercept of the graph? what does it represent? 4. after how many years will the amount of cobalt-60 left be 6.25 mg? explain what happens to the cobalt-60 after 50 years? 5. discuss some “real-world” examples and uses of cobalt-60

Compare the following pair of numbers a and b in three ways. a. find the ratio of a to b. b. find the ratio of b to a. c. complete the sentence: a is percent of b. a=120 and b=340 a. the ratio of a to b is . b. the ratio of b to a is . c. a is nothing percent of b.

Asales representative from a local radio station is trying to convince the owner of a small fitness club to advertise on her station. the representative says that if the owner begins advertising on the station today, the club's total number of members will grow exponentially each month. she uses the given expression to model the number of club members, in hundreds, after advertising for t months.