What is the value of b in ax - by = -5 A. b= (ax-5)/y
B. b= 5-ax
C. b= ax-5y
D. Cant isolate b

What is the value of b in ax - by = -5

A. b= (ax-5)/y

B. b= 5-ax

C. b= ax-5y

D. Cant isolate b

1.75 g of 200g sample will remain radioactive after 1 hour

Explanation:

Given:

Decay rate, r = 0.079 per minute

Time, t = 1 hr = 60 min

Amount of the sample = 200 g

According to decay formula:

On substituting the value we get:

Therefore, 1.75 g of 200g sample will remain radioactive after 1 hour