You need to measure the angles wich means that u use a protractor if the angle is 90 degrees is a straight angle if it is below 90 degrees is acute and if it is above 90 degrees it's obtuse

6 0

3 years ago

How much money would I need to invest for six years at 4 1/2 percent Simple interest to earn $400?

lbvjy [14]

Answer: 1481.48

Step-by-step explanation:

SI = prt

400 = p x 0.045 x 6

400 = 0.27p

P = 400 / 0.27

P = 1481.48

6 0

3 years ago

Evaluate the series 9 + 3 + 1 +

ryzh [129]

Answer:

9 + 3 + 1 + ......... = 13.5

Step-by-step explanation:

The series 9 + 3 + 1 + is the sum of an infinite geometric sequence. The first term of the series is 9 while the common ratio is 1/3;

to obtain the common ratio we obtain the quotient of any two successive terms, 3/9 or 1/3.

The sum of an infinite geometric series with first term a and common ratio r is given by;

$S_{n}=\frac{a}{1-r}$

Plug in the values of a and r into the formula;

$S_{n}=\frac{9}{1-\frac{1}{3} }\\\\\\S_{n}=\frac{27}{2}=13.5$

8 0

4 years ago