21% is the same as 0.21 (move the decimal point to the left two place values to make it a decimal).
Next, to make it a fraction, move the decimal to the right two place values, and place the number over 100
0.21 = 21/100
21/100 is your answer
hope this helps
Answer: 162000 seconds
Step-by-step explanation: There are 162000 seconds in 45.0 hours.
Answer: 
Step-by-step explanation:
By the negative exponent rule, you have that:
By the exponents properties, you know that:
Therefore, you can rewrite the left side of the equation has following:
Descompose 32 and 8 into its prime factors:
Rewrite:
Then:
As the base are equal, then:
Solve for x:
Answer: At most 9 attendees can be there.
Step-by-step explanation:
Given equation:<em> d = 8a</em> , where <em>a</em> represents the number of attendees, and the variable <em>d </em>represents the cost in dollars.
To find : the number of attendees, if Will budgets a total of $72 for his graduation picnic.
72=8a
⇒ 9 = a [divide both sides by 8]
∴ a= 9
Hence, at most 9 attendees can be there.
