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halltristan657
28.08.2020 •
Mathematics
In 2007, the first generation of the i-phone sold for $499. The average cost of an i-phone today is $999. At a press conference just outside a telephone museum in Cle Elum, WA, the CEO of Apple, Tim Cook, stated that the rise in cost is purely due to inflation. Use the Consumer Price Index to either verify or falsify Cooks’s statement. Is he wrong?
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Ответ:
the statement made by Tim Cook is TRUE
Step-by-step explanation:
Given that;
in 2007 cost of 1st gen iphone = $499 (base year price)
cost of iphone today = $999 (current year price)
Using the Consumer Price Index
the Consumer Price Index = (cost pf product in current years/cost of product base year) × 100
we substitute
CPI = (999/499) × 100
CPI = 200.2004
so the CPI is 100.2004% higher in the current year than in the base year
Checking the inflation rate
IR = (( CPI this year- CPI last year)/CPI last year) × 100
CPI last year (base year) = 100
CPI current year is = 100.2004
so
IR = (( 100.2004 - 100)/100) × 100
IR = 0.002004 × 100
IR = 0.2004%
THEREFORE the statement made by Tim Cook is TRUE
Ответ:
169.67in²
Step-by-step explanation:
This problem bothers on the mensuration of solid shapes, a cone
The expression for the total surface area of the cone is
A= πrl + πr²
Given data
Diameter d =9in
Radius r = d/2= 9/2= 4.5in
Slant height l = 7.5in
A= πrl + πr²
Substituting our given data we have
A= 3.142*4.5*7.5+ 3.142*4.5²
A= 106.04+63.63
A= 169.67in²
The total surface area is 169.67in²