Answer:
50
Step-by-step explanation:
Plug 10 in for x.
First, you multiply 2.1 by 3.2, which gives you the answer of 6.72. Then, you multiply 10-2 by 10-4. One rule about multiplying exponents, you just add the exponents. So 10-2 x 10-4 = 10-6. Finally you get the answer of C. 6.72 x 10-6.
So i believe you need to round the whole number, if so than 8 * 3 = 24 and 20 * 3 = 60
Y = cos(x)
sqrt(3)/2 = cos(30º)
dy = -sin(x)*dx
dy = -sin(30º)*(pi/180) = (1/2)*(pi/180)
y + dy = cos(x) - sin(x)dx
y + dy = sqrt(3)/2 - (1/2)*(pi/180) = 0.8573
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80 since he starts off with 38 stamps then gains 6 each month for 7 months (6x7=42) so 42+38=80
