Investment Modeling Spring 2019, Practice Set # 1
1. What is the tot?
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x=c (1,5,6,3,2)
tot=10 *x - (2+x)
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2. (Code) What is x?
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x=c (55, seq (1,10,2),c (2,4,5))
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3. (Code) What is a?
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a=c (55, seq (1,10,2),c (2,4,5))
a[2]=3
a[8]=6
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4. (Code) What is t?
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b=1:5
t=0
for (i in b)
{
t=t+b
}
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5. (Code) What is b?
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b=c ()
a=1:5
for (x in a)
{
if (a[x]<3)
{
b[x]=a[x]+3
}
else
{
b[x]=a[x]-3
}
}
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6. (Code) What is b?
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b=c ()
a=1:5
for (x in a)
{
if (a[x]<3)
{
b[x]=a[x]+3
}
else
{
b[x]=a[x]-3
}
}
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7. (Code) What is e?
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a=2
b=4
c=3
p=1:4
e=p*a^2+p*b+p* (c-2)
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8. (Code) What is c?
9. (Code) What is c?
10. You invested $100 in investment B for 2 years, and $100 in investment B for 1 year. Your rate of return for both years was exactly the same. If at the end of the 2 years the money grew to $215.25, what was your compound return?
11. You invested $100 in investment A, Year 1 it grew by 10%, Year 2 by -5%, Year 3 by 7%, and Year 4 by 9% . What was the compound return for this investment?
12. What is A(2,6)?
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A=function (x,y)
{
if (x*y>6)
{
return(B(x+1,y-1))
}
else
{
return(5*x-2*y)
}
}
B=function (a,b)
{
if (a+b>8)
{
return (a*b)
}
else
{
return (4*a-2*b)
}
}
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