Marissa joined a music club that charges a $5 membership fee and $0.85 for each song downloaded (added). Which function can be used to find the relationship between y, the total cost, and x, the number of songs downloaded

y=$(5+0.85x)

Step-by-step explanation:

The music club charges a membership fee of $5

Marissa is also charged $0.85 for each song downloaded (added)

Let x, the number of songs downloaded

Cost of Songs downloaded=$0.85 X x = $0.85x

Marissa's Total Cost, y= Membership Cost+Cost of Songs downloaded

=$(5+0.85x)

Total Cost, y=$(5+0.85x)

b.an increase in a causes b to decrease

the total estimated nappy use.=10,500,000

step-by-step explanation:

given that on an average the average baby uses 3528 napkins.

in a particular year 2014, the number of births were 299697 in new south wales.

rounding off the number of births to the nearest hundred thousand we have

no of birtsh = 300000

also rounding off the average usage to nearst thousand we get

average use of a baby = 3500

hence total number of nappy estimated to be used = 3500x300000

= 10,500,000

answer is 10,500,000 nappies