My dad has also become quite interested in blackjack since retiring from his electrical engineer- ing job at Texas Instruments. Based on his historical data, in a random hour of blackjack play, his earnings are normally distributed with mean $130 and SD $90. a. What is the probability he'll lose money in a random hour of play? (WISE, VIZ )b. Looking at hourly earnings can be silly if you tend to play for many hours per day. Suppose my dad plans to play for 8 hours each day. Find the distribution that models his daily earnings and how much money he'd have to win or lose to be among the worst 1% of days possible. (WISE, VIZ c. Discuss any assumptions you made in your answer to part b and whether you think they are justified.

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

10 b/c 5*2 =10

step-by-step explanation:

idk

step-by-step explanation:

the 8 in 8,420 is in the thousands place so it's value is 8 thousand.

the 8 in 6,870 is in the hundreds place so it's value is 8 hundred.

divide 8000 by 800 to find the answer:

8000 / 800 = 10

the 8 in 8,420 is 10 times greater than the 8 in 6,870