Answer:
120 ft²
Step-by-step explanation:
The formula to find the area of a triangle is :
Area = 
× base × height
Given that,
base ⇒ 30 ft
height ⇒ 8 ft
<u>Let us solve it now.</u>
Area = × base × height
Area = × 30 ft × 8 ft
Area = × 240 ft²
Area =<u> 120 ft²</u>
Answer:
<h2>(fog)( x) = 4x² + 2</h2>
Step-by-step explanation:
f(x) = x² + 2
g(x) = 2x
To find (fog)( x) substitute g(x) into f(x) that's for every x in f (x) replace it with g (x)
We have
(fog)( x) = ( 2x)² + 2
We have the final answer as
<h3>(fog)( x) = 4x² + 2</h3>
Hope this helps you
B. The variable d represents an unknown number. So, 21+d, is equal to 21+an unknown number.
Answer: 30g
Step-by-step explanation:
In this question (t½) of isotope is 40 days, which means that after 40 days half of the sample would have decayed and half would be left as it is.
After 40 days ( first half life) 240 /2 = 120 g decays and 120 g remains left.
After another 40 days ( two half lives or 80 days) 120 /2 = 60 g decays and 60 g remains left .
after three half lives or 120 days, 60/2 = 30g decay and 30 g of the isotope will be left.
