Victory for the ACT Student Text 15e

392 • C AMBRIDGE P RACTICE T EST R EINFORCEMENT

Šƒ– ‹• –Š‡ •‘Ž—–‹‘ •‡– ȓ x ǡ y b ǡ ˆ‘” –Š‡ ˆ‘ŽŽ‘™‹‰ •›•–‡ ‘ˆ ‡“—ƒ–‹‘•ǫ ax y b + = ax y b 2 2 + = Ǥ , a b 1 ( 2 Ǥ ǡ a b " , Ǥ , a b 0 ( 2 Ǥ ǡ a b b a ( 2 Ǥ , b a a b 2 2 ( 2 Ȕǡ ‹ –‡”• ‘ˆ a

and

58.

DO YOUR FIGURING HERE.

 –Š‡ ϐ‹‰—”‡ „‡Ž‘™ǡ sin ˜ƒŽ—‡ ‘ˆ cos i ?

Ǥ Šƒ– ‹• –Š‡

4 r

59.

i

Ǥ

2

r

16

4 Ǥ r Ͷ Ͷ Ǥ r 2 16 2 Ǥ r 2 4 Ǥ r r 16 2

60. ˆ ͵…‘’‹‡” ƒ…Š‹‡•…ƒ…‘’› ͵ͲͲ •Š‡‡–• ‹ ͵ ‹—–‡•ǡ ƒ••—‹‰ –Š‡ •ƒ‡ ”ƒ–‡ǡ Š‘™ Ž‘‰ǡ ‹ ‹—–‡•ǡ ™‹ŽŽ ‹– –ƒ‡ ͸ •—…Š…‘’‹‡”• –‘…‘’› ͸ͲͲ •Š‡‡–•ǫ Ǥ ʹ Ǥ ͵ Ǥ Ͷ Ǥ ͸ Ǥ ͻ

END OF TEST 2 STOP! DO NOT TURN THE PAGE UNTIL TOLD TO DO SO. DO NOT RETURN TO THE PREVIOUS TEST.