-213+x=-312
x=-312+213
x=-99
Answer:
Step-by-step explanation:
Exponential growth
For number 2. The answer is $6.49
The slant height of the right circular cone will be 
<h3>What is slant height of cone? </h3>
The formula for the slant height of the cone is given as:

Here we have
r=2 units
h=4 units
By putting the values we will get




Hence the slant height of the right circular cone will be 
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