Did you mean 2.6(3)? If so you would do 2.6 times 3 which is 7.8
Answer:
The travel size costs 6 % as much as the regular size. Thus the regular size would be more economical and thus a better buy
Step-by-step explanation:
step 1
<em>Find out the unit rate of a regular tube of toothpaste</em>
we know that
To find out the unit rate, divide the total cost by the total weight
so
![\frac{2.50}{3.2}=\$0.78\ per\ ounce](https://tex.z-dn.net/?f=%5Cfrac%7B2.50%7D%7B3.2%7D%3D%5C%240.78%5C%20per%5C%20ounce)
step 2
<em>Find out the unit rate of a travel size tube of toothpaste</em>
we know that
To find out the unit rate, divide the total cost by the total weight
so
![\frac{1.00}{1.2}=\$0.83\ per\ ounce](https://tex.z-dn.net/?f=%5Cfrac%7B1.00%7D%7B1.2%7D%3D%5C%240.83%5C%20per%5C%20ounce)
step 3
Find out the percent of increase
we have that
The unit rate
represent the 100%
so by proportion
Find out what percentage represent the difference ($0.83-$0.78=$0.05 per ounce)
![\frac{0.83}{100\%}=\frac{0.05}{x}\\\\x=100(0.05)/0.83\\\\x=6\%](https://tex.z-dn.net/?f=%5Cfrac%7B0.83%7D%7B100%5C%25%7D%3D%5Cfrac%7B0.05%7D%7Bx%7D%5C%5C%5C%5Cx%3D100%280.05%29%2F0.83%5C%5C%5C%5Cx%3D6%5C%25)
therefore
The travel size costs 6 % as much as the regular size. Thus the regular size would be more economical and thus a better buy
Answer: 2 enlargments
Step-by-step explanation:
Use proportion for each enlargment you do
Side a=6cm Side b=4cm
6:4=x:7 4:4=b1:7
7*6=4a1 b1=28/4
a1=42/4 b1=7 after first enlrge
a1=10.5 after first enlarge 7:4=b2:7
10.5:4=a2:7 b2=49/4
a2=73.5/4 xb2=12.5 after 2nd enlarge
a2=18.375 after 2nd enlarge
12.5:4=b3:7
18,375:4=a3:7 b3=21.875 cm after 3rd enlargement
a3=32.15after 3rd enlargement
Values after 3rd enlargement are higher than dimension given for picture wall
30 cm by 20 cm