What is 19+11+77-2/10? for math points

19 + 11 = 30 + 77 = 107 - 2/10 = 106.8

If you're confused by the fraction just do 2 divided by 10 and you should get 0.2.

So, instead of doing 2/10 you can do:

19 + 11 = 30 + 77 = 107 - 0.2 = 106.8

Have a good day!

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2