John sees a scale drawing of a boat that has 1:30 on it. He measures the length of the boat on the scale drawing to be 10 cm. How long is the real boat, in centimeters? 100 cm
5000 cm
200 cm
500 cm

500cm.

Step-by-step explanation:

the scale 1:50 means that

1cm represents 50cm.

10cm represents ?

crossmultiply 10 × 50 ÷ 1 = 500cm

step-by-step explanation:

descending order means to order the polynomials from the term with the largest exponent to the term with the smallest exponent.  

therefore, the correct answer is d.  

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )