Surface area = 2(wl + hl + hw) = 2wl + 2hl + 2hw
Conditions:
base length is shrunk by a factor of 2/3
width is quadrupled
height is cut in half.
l ⇒ 2l/3 w ⇒ 4w ; h ⇒ h/2
SA = <span>2wl + 2hl + 2hw
</span>SA = 2(4w)(2l/3) + 2(h/2)(2l/3) + 2(h/2)(4w)
SA = (16wl/3) + 4hl/6 + 8hw/2
Simplify:
SA = 16/3 wl + 2/3 hl + 4hw Choice C.
He saved more money on the suit.
1/3 of 45 is 15, but 160 * .12 is 19.2,
Step-by-step explanation:
1) the rule: m∠1+m∠2+m∠3=180°;
2) according to the rule above: m∠P+m∠Q+m∠R=180°;
x+x+43+2x-15=180°; ⇔ 4x=152°; ⇒ <u>x=38°</u>;
3) the angles: P=2x-15=<u>61°;</u> Q=x+43=<u>81°</u>; R=x=<u>38°</u>.