Plzzz answer all of these questions to get 100 pointd

1. 42.8 °C

2. Aceves' class: $133.33; Baca's class: $266.67; Canyon's class: $200.

Step-by-step explanation:

1.) The difference between two numbers is found by subtraction. Since we want to report the positive difference, we can subtract the smaller number from the larger:

-21.2 °C - (-64 °C) = (64 -21.2) °C = 42.8 °C

The temperature must drop 42.8 °C more for the antifreeze to solidify.

2.) We want to divide the prize money in the ratio

1200 : 2400 : 1800 = 2 : 4 : 3

There are 2+4+3 = 9 total ratio units, so each one must stand for $600/9 = $66 2/3.

Then the money to Aceves' class is ...

2 × $66 2/3 = $133 1/3 = $133.33

And the money to Baca's class is ...

4 × $66 2/3 = $266 2/3 = $266.67

Finally, the money to Canyon's class is ...

3 × $66 2/3 = $200.00

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Note on the division:

The 1/3 cent that Aceves' class should have gotten goes to Baca's class in the above scenario. It might make sense for the classes to donate $6 to the school and divide the remaining $594 as $132 : $264 : $198. If they actually want the pennies, they could donate $0.06 to the school and split the result as $133.32 : $266.64 : $199.98.

the first one, all those points on the line just make a strait line.