Review the table of values showing the number of days each year from 1990 to 1997 that air quality in San
Diego did not meet federal air quality standards.
Which phrase best describes the regression model for
the data?
Years since 1989
Number of Days
power model; y = 41.217-0.86
O exponential model, y = 54.97(0.71)*
O logarithmic model; y = 39.14 – 17.93 In x
quadratic model; y = 0.60x2 - 10.38x + 46.73
1
39
2.
27
3
19
4
14
5
9
6
12
7
2
8
1

In a certain pentagon, the interior angles are a, b,c, d,e where a, b,c, d,e are integers strictly less than 180. ("strictly less than 180" means they are "less than and not equal to" 180.) if the median of the interior angles is 61 and there is only one mode, then what are the degree measures of all five angles?

Marco is studying a type of mold that grows at a fast rate. he created the function f(x) = 345(1.30)x to model the number of mold spores per week. what does the 1.30 represent? how many mold spores are there after 4 weeks? round your answer to the nearest whole number. 1.30 represents the number of mold spores marco had at the beginning of the study; 985 mold spores 1.30 represents the number of mold spores grown in a given week; 448 mold spores 1.30 represents the 30% rate of weekly growth; 345 mold spores 1.30 represents the 30% rate of weekly growth; 985 mold spores

Ahome improvement store rents it’s delivery truck for $19 for the first 75 minutes and $4.75 for each additional 1/4 hour. if a customer rented the truck at 11: 10 am and returned the truck at 1: 40 pm the same day, what would his rental cost be?