0.3*42 this gives you a 30% discount
3/10*42 this gives you a 30% discount
0.03*42 this gives you a 3% discount
3 *4.2 This is not a discount
Answer:
80.5
Step-by-step explanation:
It is useful because it helps you know how many faces the prism or pyramid has
First we have to make the fractions even so there denominator have to be equal. So 15 times 2 gets 30 and 6 times 5 gets 30 too. Ok now multiply the nominator by the corresponding number of 25/30 and 16/30. Subtract to get 9/30 now simplify to get 3/10.
The circumference is 56.52
18in=diameter. Circumference= 3.14(pie) times the diameter. 18 x 3.14= 56.52
