Ineed with 2 problems and i need explaining how i got the answer correct for both of the problems and it’s very hard and i’m struggling with it and if you need to see the picture big then click on it and it will be big

Find the value of the cosine for angle a

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.)

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s? a. 56.3 b. 33.7 c. 41.8 d. 48.2