Subtract 4.66 × 10^-5 - 7.34 x 10^-7 (1 point)
To subtract these numbers, we must first determine their exponents.
4.66 × 10^-5 has an exponent of -5.
7.34 × 10^-7 has an exponent of -7.
Since the exponents are different, we need to adjust the numbers so that they have the same exponent.
To do this, we can multiply 7.34 × 10^-7 by 10^2, which equals 7.34 × 10^-5.
Now we can subtract:
4.66 × 10^-5 - 7.34 × 10^-5 = (4.66 - 7.34) × 10^-5 = -2.68 × 10^-5
Therefore, 4.66 × 10^-5 - 7.34 × 10^-7 is approximately -2.68 × 10^-5.
The U.S. national debt was $2.9617 × 10^13 in 2021 and $3.98 × 10^11 in 1971. Find how much the debt increased in the 50-year period. (1 point)
To find how much the debt increased in the 50-year period, we need to subtract the debt in 1971 from the debt in 2021.
$2.9617 × 10^13 - $3.98 × 10^11 = ($2.9617 - $0.398) × 10^13 = $2.5637 × 10^13
Therefore, the U.S. national debt increased by approximately $2.5637 × 10^13 in the 50-year period.
The size of a hydrogen atom is about 1.2 × 10^-10 m across. The size of an oxygen atom is 0.000000000152 m across. What is the difference between the sizes of these atoms in scientific rotation? (1 point)
To find the difference between the sizes of the hydrogen and oxygen atoms, we need to subtract the size of the hydrogen atom from the size of the oxygen atom.
0.000000000152 m - 1.2 × 10^-10 m
To make the subtraction more manageable, we can convert both sizes to scientific notation with the same exponent.
0.000000000152 m = 1.52 × 10^-10 m
Now we can subtract:
1.52 × 10^-10 m - 1.2 × 10^-10 m = (1.52 - 1.2) × 10^-10 m = 0.32 × 10^-10 m
Simplifying further, we can rewrite 0.32 × 10^-10 m as 3.2 × 10^-11 m.
Therefore, the difference in sizes between the hydrogen and oxygen atoms is approximately 3.2 × 10^-11 m.
Platelets and red blood cells are components of the blood. A typical platelet and red blood cell have diameters of approximately 2.33 × 10- m and 0.0000075 m, respectively. Which blood component has a bigger diameter, and approximately by how much? (1 point)
To determine which blood component has a bigger diameter, we need to compare the diameters of the platelet and red blood cell.
The diameter of the platelet is 2.33 × 10^-6 m.
The diameter of the red blood cell is 0.0000075 m.
To make the comparison easier, we can convert both diameters to the same units.
0.0000075 m can be written as 7.5 × 10^-6 m.
Now we can compare the diameters:
2.33 × 10^-6 m < 7.5 × 10^-6 m
Therefore, the red blood cell has a bigger diameter than the platelet.
The difference in diameter is approximately 7.5 × 10^-6 m - 2.33 × 10^-6 m = 5.17 × 10^-6 m.
Therefore, the red blood cell is larger than the platelet by approximately 5.17 × 10^-6 m.