The expression 15a + 30c represents the cost for a adults and c children to enter the amusement park. Mary's youth group wants to go to the amusement park. If there are 20 children and 10 adults in the youth group, how much will it cost for all members of the youth group to go to the amusement park together?

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step-by-step explanation:

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answer: the answer is 110

the answer is -1 1/5, also a

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the circumference of a circle is, 10.676 cm.

step-by-step explanation:

the formula for circumference of a circle is given by:

where

c is the circumference of a circle and

d is the diameter of a circle.

given: diameter(d) = 3.4 cm and use

substitute these values in [1] we get;

cm

therefore, the circumference of a circle is, 10.676 cm