Is this correct also I need help with question 4 please and thank you

The answer for number 4 is 40:1

Step-by-step explanation:

The answer is 40:1 because we have to change values to whole numbers.

Convert the whole number 20 to a fraction with 1 in the denominator.

When we do that, we should then have:

20 : 1/2 = 20/1 : 1/2

We also have to convert fractions to integers by eliminating the denominators.

Our two fractions have unlike denominators so we find the Least Common Denominator and rewrite our fractions as necessary with the common denominator  

LCD(20/1, 1/2) = 2

We now have:

20 : 1/2 = 40/2 : 1/2

Our two fractions now have common denominators so we can multiply both by 2 to eliminate the denominators.

We then have:

20 : 1/2 = 40 : 1

Try to reduce the ratio further with the greatest common factor (GCF).  

The GCF of 40 and 1 is 1

Divide both terms by the GCF, 1:

40 ÷ 1 = 40

1 ÷ 1 = 1  

The ratio 40 : 1 cannot be reduced further by dividing both terms by the GCF = 1 :  

Therefore:

20 : 1/2 = 40 : 1 is the answer.

b. 6

step-by-step explanation:

we are given the table representing an exponential function.

we can see from the table that, as x is increasing, the value of y is increasing in the power of 6.

i.e. the following relation is obtained,

x = 1, y = 6

x = 2, y = 36 =

x = 3, y = 216 =

x = 4, y = 1296 =

x = 5, y = 7776 =

so, the geometric series obtained is .

thus, the common ratio is given by = = 6.

hence, the common ratio is 6.

step-by-step explanation: