The answers are a, igneous, and b, sedimentary. Hope this helped!
Answer:
The answer is below
Explanation:
The half life of a substance is the time required by that substance to reduce to half of its initial value. The half life is calculated using the formula:
Given that t = 87 years, half life = 29 years, therefore the quantity of strontium-90 left is:
That is one-eight of Strontium 90 would be left after 87 years
B, metals, nonmentals all bond to be stable
<span>a).only leaves will show color flower will tend to be dark.
b).only flower will show up leaves will tend to be dark.
c). both leaves and flowers will be dark.
(any object which has a color absorbs rest of colors of spectrum except that color which it reflects
for example: green leaves absorbed v.i.b.y.o.r. except green which is reflected by leaves)
so if placed in red light they will not show any color because leaves will absorb red color)</span>
Answer:
Negative Feedback
Explanation:
Negative feedback is a stimulus that cause the system to move in the opposite direction of what has happening. For example if your are cold, you will shiver in order to create heat that will cause your body temperature to increase. But if you are hot you will sweat which will cause your body temperature to decrease.
