250 books in total. 15 times 10, plus the 100 on the shelves.
Variable: r constant: 7 coefficient: -2 and 8
Answer:

Step-by-step explanation:
Here, given:

Now, here to find the values of 
As we know: 
Now, substituting x = 4 in f(x):

Now, substituting x = 1/2 in g(x):

Answer:
marked price = $69,000
Step-by-step explanation:
cost price = $60,000
profit
= 15%
= 15% × cost price
= 15/100 × $60,000
= $9000
marked price
= cost price + profit
= $60,000 + $9000
= $69,000
i am not too sure if i am correct in this but i will give it a go. i apologise if i am incorrect. In finding the diameter the equation C/π. in finding the radius the equation is (C/π)/2
Part 1
Q2) c=650πcm
650 X π= c so d must be 650cm
Q4) c=241πcm
241 X π= c so d must be 241
Q6) c=802cm
c/π=d =802/π= 255.28cm (2DP)
Q8) c=962cm
c/π=d = 962/π= 306.21cm (2DP)