Answer:

Step-by-step explanation:
To convert from degree Fahrenheit to Celsius, we use the formula:

If Habib's recipe is to be baked at 356 degree Fahrenheit, then we substitute F=356 to obtain an equivalent value in degree Celsius.

Habib should bake his scones at
.
I'm not 100% sure because it is rare to ask about adding scientific notation but I would answer it like this:
8.4x10^8 +3.7x10^9=
12.1 x 10^17
final answer
Starting with the paints, we have 15$ as our base value. Next, since we add $24.50 for each new canvas bought, 24.5*x=the amount of money for x canvases. Therefore, since 15 is our base value, we have 15+24.5*6=162