Which values have exactly three significant figures? check all that apply. 0.0230 grams 0.035 ounces 0.804 inches 3.150 liters 140 feet 509 kilometers

The values that have exactly three significant figures are,

0.0230, 0.804, 140 and 509

Step-by-step explanation:

Significant numbers or significant number is a number that is used to express the value of the number.

In 0.0230 grams, there are three significant figures,

In 0.035 ounces, there are 2 significant figures,

In 0.804 inches, there are 3 significant figures,

In 3.150 liters, there are 4 significant figures,

In 140 feet, there are 3 significant figures,

in 509 km, there are 3 significant figures.

18.75 gallons

step-by-step explanation:

answer:

a=9

step-by-step explanation: lmk if you need a explanation