The sides of a triangle are 6,8 and 10 respectively find the perimeter of a similar triangle whose shortest side measures 3

This is different from the first one can someone me

If the value of cos330°is√3/2 then find cos 165°.

Fatima plans to spend at least $15 and at most $20 dollars on sketch pads and pencils. if she buys 2 sketchpads, how many pemcils can she buy while staying in her price range? fatima can buy between and pencils. ? (type whole numbers. use ascending? order.)