Lets say the student takes the maximum socre on his last test, so he gets 100. Now, his average on the six texts will be:
(75+85+90+95+94+100)/6 = 89.83
So, if taking 100 is not enough to get to the average of 90, this means he would need a score greater than 100, which is impossible as 100 is the maximum. So, the student CAN'T get an A
D=546m. r=1.3m/sec. 546m=1.3m/sec(t). 546m divided by 1.3m/sec = t = 420 sec (the meters will cancel out, leaving the answer to just seconds). 420 seconds divided by 60sec/min = 7 minutes.
The square root of 7 would like between 2 and 3. This is because 2 x 2 is 4's square root and 3 x 3 is nine's square root. Seven is between four and nine.
