Answer:
13) Carbon Dioxide and water
Explanation:
The fact is that during photosynthesis, Carbon Dioxide is needed by green plants to manufacture their food and water is also needed but also chloroplast which contained chlorophyll is also needed
hence, the options are somehow confusing
14) perhaps it should be all of the above
Answer: 5.74×10^8 stacks
Explanation:
The U.S. quarter has a mass of 5.67 g and is approximately 1.55 mm thick.
1 stack would contain $2.83x 10^4
No. of stacks to pay off debt=
$16,213,166,914,811/2.83 ×10^4
= 5.74 × 10^8 stacks
Answer:
25 mL of the 10% solution.
Explanation:
<em>Clayton will mix x milliliters of a 10%, percent by mass saline solution with y milliliters of a 20%, percent by mass saline solution in order to create an 18%, percent by mass saline solution.</em> This can be described with the following equation:
0.1 x + 0.2 y = 0.18 (x + y) [1]
<em>If Clayton uses 100 milliliters of the 20%, percent by mass saline solution, how many milliliters of the 10%, percent by mass saline solution must he use?</em>
If y = 100 mL, what should be the value of x?
Let's solve [1] for "x" and replace with the value of "y".
0.1 x + 0.2 y = 0.18 (x + y)
0.1 x + 0.2 y = 0.18 x + 0.18 y
0.02 y = 0.08 x
x = 0.25 y = 0.25 × 100 mL = 25 mL
