Answer is A
if u need me to write out the work for it lemme know
Answer:
Dave will make $200 for the sales of $1000.
Step-by-step explanation:
Given are:
Rate of commission of Dave = 20%
Total sales = $1000
The amount that Dave will make will be obtained by calculating the 20% of total sales.
For that we will multiply the sales with 0.20

Hence,
Dave will make $200 for the sales of $1000.
4 significant digits in 0.0070
Given that,
Total number of snails shells and shark teeth = 60
The ratio of snail shells to shark teeth is 5:1
To find,
Total no of snail shells used by the Jeweler.
Solution,
Let there are 5x snail shells and x shark shells.
According to question,
5x+x = 60
6x = 60
x = 10
Snail shell = 5x
= 5(10)
= 50
Hence, he uses 50 snail shells.