I believe the answer is D. because -12 + -1 equal -13
Answer:
19.1 feet
Step-by-step explanation:
This forms a right triangle
use the pythagorean theorem
a^2 + b^2 = c^2
a^2 + 6^2 = 20^2
a^2 + 36 = 400
a^2 = 364
a = 19.0787840283
Rounded
19.1 feet
Answer:
1.92 or 4.56 answer when rounded to 100th
Answer:
x=13
Step-by-step explanation:
Angle A and angle B are supplementary
Supplementary angles add to 180 degrees
<A + <B = 180
7x-18 + 8x+3 = 180
Combine like terms
15x -15 = 180
Add 15 to each side
15x-15 +15 = 180+15
15x = 195
Divide by 15
15x/15 =195/15
x =13
Answer:

Step-by-step explanation:
The time constant for the isotope decay is:


Now, the decay of the isotope is modelled after the following expression:

The time is now cleared with some algebraic handling:


Finally, the time need for the element X to decay to 43 grams is:

