Ok the surface area is 2lw+ 2lh + 2wh because that is the sum of all the surfaces
You get 96 + 96 + 72 mm^2
Answer:
1.5 ml
Step-by-step explanation:
We have been given that the concentration on hand is 10 mg per ml.
We know that gr stands for grains.
We know that 1 gr equals 60 mg.
First of all, we will convert 1/4 gr to mg as:



1 ml equals 10 mg. We can set an a proportion as:




Therefore, 1.5 ml is needed for the dose.
Let 6x-3y=3 be equation 1 and -2x +6y=14 be equation 2.
Take 2 common from eq 2 let the optioned eq be equation number 3.
And solve eq number 1 and 3.