Math Questions For #'s 1-2 find each unit rate and round to the nearest hundredth if necessary
1.) $140 for 18ft^{2}
2.) 14 lb for $2.99
For #'s 3-4 circle the better deal and give the unit rate for the better deal
3.) $56/25gal or $32.05/15gal
4.) $160/5g or $315/9g
5-8 i have to do on my own bc they are word problems
9.) How can you use rates to determine whether a situation is proportional relationship?

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

42%

step-by-step explanation:

we know,

total people = 60

total males = 25

percentage of males

= 25/60 × 100

= 25/6 × 10

= 25/3 × 5

= 125 / 3

= 41.

rounding of = 42%

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