Answer:
they will have 15.02 left over
Step-by-step explanation:
Alex:
21*.35=7.35
21-7.35= 13.65
13.65*.10=1.37
13.65+1.37=15.02
Lara:
21*.65=13.65
13.65*1.10=15.02
They are both correct but the easier way to get the answer is Alex's way.
Neither of them are equivalent on both sides.<span />
Step-by-step explanation:
Cardboard needed to make tube =
Circumference of Circle base (remember the base is hollow therefore there is no area needed.) x Length of Tube
given r = 2.25cm
L = 24cm
Cardboard needed =
So, 10%-7%=3%=$294
$294/3%=$9800
Answer: The cost price of the necklace is $9800.