f(4) = 3×4^2+15
4^2=16
3×16
48+15
63
f(4)=63
Answer:
Step-by-step explanation: f(4)=3x^2+15
3(4)^2+15
3*16+15
3*16=48
48+15=63
97.12°
Step-by-step explanation:
the value of the highlight angle =
tan~¹ 1/3 + tan~¹ 5/1 =
18.43° + 78.69° = 97.12°
2(lw + wh + hl)
2×71
142
this is the answer