Yes yes woeoshdenenejdjdjdjejejrjrrjekekekekekeek 30
The base is the number that the exponent is attached to. So ten squared, the base is ten.
For number 1, the median is 8
For number 2, the mode is C.100
And for number 3, the mean is D.410
The cost of each pen is $50, because you spend $600 on books leaving $200 to buy FOUR pens, making it $50 per pen
I hope this helps you
1/21+1/28=1/t
4/84+3/84=1/t
5/84=1/t
t=84/5
84/5 1
21 ?
?.84/5=1.21
?=5/4