I believe it’s 6, so E, but I also believe I’m completely wrong-
Mass of an element = 310 grams
Percentage of the element that will decay in a minute = 5.7%
Quantity of the element that will decay in one minute :



Thus, 17.67 grams of the element will decay every minute.
Quantity of element that will decay after nine minutes :


Thus, 159.03 grams of the element will decay after 9 minutes.
Quantity of element that will remain after 9 minutes :


Thus, 150.97 grams of the element will remain after nine minutes.
We can round off 150.97 to 151.00.
Therefore, <u>151.00 grams</u> of the element will remain after 9 minutes.
Answer: 1.)= -26 , 2.)= 4 , 3.)= -20 4.)=2 5.)=48 6.)=20 7.)=68 If my answer is correct can you please choose the brainlest. GOOD LESSONS ♡
Answer:
78
Step-by-step explanation:
Multiply f(x) and g(x) then evaluate for x = - 5
f(x) × g(x)
= (- 2x - 7)(- 4x + 6) ← substitute x = - 5 into the expression
= (10 - 7)(20 + 6)
= 3 × 26
= 78
I think the answer is C
Hope that helped