Answer:
Step-by-step explanation:
The calculator approximated the value of y at 7.8.
We need to complete the error interval for y.
In other words, we calculate the upper and lower bound for y.
The level level of accuracy is to the nearest tenth.
To find the lower bound, we subtract half the degree of accuracy to get:
To find the upper bound, add half the level of accuracy to get:
Therefore the error interval is
Represent these consecutive numbers (assuming that they are all integers):
x
x+1
x+2
x+3
x+4
x+5
and so on
x+8
x+9 is the tenth number. x+9 = 10, so x = 9.
Think of it this way: there are 10 consecutive numbers, and the last one is 10.
Working backwards, we get the sequence 10, 9, ... 3, 2, 1.
The sum of such an arith sequence is equal to the count of the numbers times the average of the first and last terms:
sum here = 10(1+10)/2 = 5(11) = 55 (answer)
Step-by-step explanation:
63.5*0.088 =5.588 tax for your answer
