Answer: -9 for the first one -1440 i think
Step-by-step explanation:
The measure of QS from the given line is 10
<h3>Addition postulate</h3>
From the given diagram below, we will use the following addition postulate;
QR + RS + ST =QT
Given the following parameters
RT = 15
RS = 7 , and
QT = 18
Substitute
QR + RT =QT
QR + 15 = 18
QR = 18 - 15
QR =3
Determine QS
QS = QR + RS
QS = 3 + 7
QS = 10
Hence the measure of QS from the given line is 10
Learn more on addition postulate here: brainly.com/question/2134445
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The half-life is 29 years.
116 : 29 = 4
So we will have 4 periods of half-life:
( 1/2 )^4 = 1/16
150 g * 1/16 = 9.375 g
Answer:
9.375 g of strontium -90 will remain after 116 years.
We have been given that various circular targets are used by archery students. Daryl is using a target with an area of 36π square inches. We are asked to find the circumference of the target.
To find the circumference of the target, we will use area of circle and circumference of circle formulas.
We know that area of circle is and circumference of circle is , where r represents radius of circle in both formulas.
First of all, we will equate area formula with given area of target and solve for r as:
Now we will take positive square root as:
Therefore, radius of circle is 6.
Now we will substitute in circumference of circle formula.
Therefore, the circumference of target is .