Acar that runs on corn ethanol will emit
mmt of co2 each year.

2.256

Explanation:

This is a percent change problem. The CO2 emitted by a car using gas is 4.7 MMt per year. The CO2 emitted by a car using corn ethanol made from biomass is 52% less than 4.7 MMt.

Find 52% of 4.7 MMt:

0.52 × 4.7 = 2.444.

Subtract 2.444 MMt from 4.7 MMt:

4.7 − 2.444 = 2.256.

The solution is 2.256 MMt.

Explanation:

This is a percent change problem. The CO2 emitted by a car using gas is 4.7 MMt per year. The CO2 emitted by a car using corn ethanol made from biomass is 52% less than 4.7 MMt.

Find 52% of 4.7 MMt:

0.52 × 4.7 = 2.444.

Subtract 2.444 MMt from 4.7 MMt:

4.7 − 2.444 = 2.256.

The solution is 2.256 MMt.

the transfer for conduction is the heat transfering from the liquid to the spoon

the transfer for convection is the heat rising from the liquid to the air

the transfer for radiation is the heat going through the sides of the cup and to the air

at least that is what i would do