mtassy85
08.10.2019 •
Mathematics
30points
1) the function f(x) varies directly with x and f(x)= 160 when x=40. what is f(x) when x=8?
a)32
b)20
c)5
d)2
2)the function f(x) varies inversely with x and f(x)=2 when x=16. what is f(x) when x=4?
a 128
b 72
c 40
d 8
3)the pressure of a gas p(v) varies inversely with the volume of the gas v. the pressure of a gas measures 15kg/cm² when its volume is 300cm³. which equation can be used to find the pressure of the gas when the volume is changed?
a p(v)=20v
b p(v)=20/v
c p(v)=4500v
d p(v)=4500/v
4)the scale factor of the blueprimt of a shopping mall to the actual shopping mall is 1in/18ft. the area of the mall on the blueprint is 190in². what is the area of the actual shopping mall?
a 61,560ft²
b 36,118ft²
c 6840ft²
d 3420ft²
5)the scale factor of a model of a grain silo to the actual silo is 1 to 10. the volume of the actual silo is 550m³. what is the volume of the model?
a 0.55m³
b 2.75m³
c 5.5m³
d 27.5m³
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Ответ:
2.2*16/4=8 d
3.15*3*00=4500. d
4.190*18*18=61560 a
5.550/(10)^3=0.55 a
Ответ:
Bradley practice 109500 more minutes than Jonas over the course of 2 years.
Step-by-step explanation:
Jonas practices guitar 1 hour a day for 2 years.
1 year = 365 days
2 years =
1 hour = 60 minutes
So, Jonas practice for 60 minutes in 1 day
Jonas practice for minutes in 365 days =
Bradley practices the guitar 2 hours a day more than Jonas.
So, Bradley practice the guitar for hours per day = 2+1=3 hours
3 hours = 3 \times 60 = 180 minutes
Bardley practice for minutes per day = 180 minutes
Bardley practice for minutes for 730 days =
Difference in minutes in 2 years = 131400-21900=109500 minutes
Hence Bradley practice 109500 more minutes than Jonas over the course of 2 years.