Where appropriate give answers to 3 s. f Dylan kicks a rugby ball. Its height, hm, is given by
h = 20t - 5t(square)+ 1 where is the time in seconds after the kiek
a When is the ball 10 m above the ground?
When does the ball land?

Can someone check my answer? you

Carson has only $20 bills and $10 bill in her wallet. the total value of the bills is $50. she has 1 more $20 bill than $10 bills. how many each kind of bill does carson have? a. one $20 and two $10 bills b. two $20 bills and one $10 bill c. one $20 bills and three $10 bills d. two $20 bills and two $10 bills

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%