The Charlotte Motor Speedway determines their pricing as follows: r(x)=200[(x-90)]+k
Note that x represents the number of minutes on the track and that r(x) represents the total price in dollars.
Cole Trickle and Rowdy Burns are drivers that have rented the track.
- Cole's team spent $1000 for the time that he drove.
- Rowdy's team spent $800 for the 70 minutes that he drove.
If Cole and Rowdy had been able to combine their minute's total, they would have only paid a total of $1400.
What is the range of minutes (x) that Cole could have driven at the racetrack?

Consider the function represented by the equation 1/2 j + 1/4 k equals 3 which shows the equation written in function notation with j as the independent variable

In a test for esp (extrasensory perception), the experimenter looks at cards that are hidden from the subject. each card contains either a star, a circle, a wave, a cross or a square.(five shapes) as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. when the esp study described above discovers a subject whose performance appears to be better than guessing, the study continues at greater length. the experimenter looks at many cards bearing one of five shapes (star, square, circle, wave, and cross) in an order determined by random numbers. the subject cannot see the experimenter as he looks at each card in turn, in order to avoid any possible nonverbal clues. the answers of a subject who does not have esp should be independent observations, each with probability 1/5 of success. we record 1000 attempts. which of the following assumptions must be met in order to solve this problem? it's reasonable to assume normality 0.8(1000), 0.2(1000)%30 approximately normal 0.8(1000), 0.2(1000)% 10 approximately normal srs it is reasonable to assume the total number of cards is over 10,000 it is reasonable to assume the total number of cards is over 1000

Type the correct answer in each box. spell all the words correctly, and use numerals instead of words for numbers. if necessary, use / for the fraction bar(s).