To answer this question you should begin with the coin that has a higher value. If you start with the dime and then just add the correct number of pennies to total $0.40, you will see that you will need 3 dimes ($0.30) and 10 pennies ($0.10).
I used a guess and check strategy starting with 2 dimes.
The answer's are:
1. About the same.
2. Greater for the 13 - 14 year old's.
Hope this helps!
Answer:
Step-by-step explanation:
40°+31°=71°
trinagle =180°
180°-71°=109
180-109=71°
X=71°
