IV. Pre-Test:
Read each word problem and solve for the missing number.
1. The ratio of boys to girls in a class is 6:7. If there are 52 learners in the class,
how many boys and girls could there be in the class?
2. The ratio of 2 numbers is 3:5. The larger number is 30. What is the smaller
number?
3. Divide 128 chairs among 3 rooms in the ratio of 1:3:4.
4. Mother mixed cream and milk in the ratio of 2 parts cream to 3 parts milk. How
many cups of each are needed to have 80 cups of mixture?
5. Six bars of soap cost P 108.00. How much will 10 bars of soap cost?

No1. boys: 24

       girl: 28

Step-by-step explanation:

No1. 6/7+6 * 52 (for boys)

7/7+6 * 52 (for girls)

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.

i would be happy to . most people on would also love to i'm sure. if you just want someone who has done algebra before and want a little more personal relationship than just begging strangers for , i can certainly be of service. i do have college myself so i might not be 24/7.