The worldwide sales of flash memory chips (in billions of dollars) is approximated by S(t) = 4.3(t + 2)0.94 (0 ≤ t ≤ 6)
where t is measured in years, with t = 0 corresponding to 2002. Flash chips are used in cell phones, digital cameras, and other products.†
(a)
What were the worldwide flash memory chip sales in 2002, in billions of dollars? (Round your answer to two decimal places.)
$
billion
(b)
What were the estimated sales for 2007, in billions of dollars? (Round your answer to two decimal places.)
$
billion
Need Help? Read It

< xcy ≅ < xby

step-by-step explanation:

in δcax and δbax,

so, δcax ≅ δbax (side-angle-side or sas)

since δcax ≅ δbax, we can conclude < acx ≅ < abx

in δacy and δaby,

so, δacy ≅ δaby (side-angle-side or sas)

since δacy ≅ δaby, we can conclude < acy ≅ < aby

now,

< acy ≅ < aby

=> < acx + < xcy ≅ < abx + < xby

=> < acx + < xcy ≅ < acx + < xby   (since < acx ≅ < abx already proved above)

subtracting < acx from both sides, we get

< acx + < xcy -< acx ≅ < acx + < xby -< acx

cancelling out < acx and -< acx from both sides, we get

< xcy ≅ < xby (proved)

using pemdas, (order of operations) you'll see the answer is 24.

sorry not knowing about that