Which of the following is equal to 3,409? A. (3 x 104) + (4 x 10²) + (9 x 10')
B. (3 x 103) + (4 x 102) + (9 x 10°)
.
C (3 x 10 ) + (4 x 10') + (9 x 10')
D. (3 x 10) + (4 x 102) + (9 x 10')

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)

Solve these problems: 1.what is the perimeter of an equilateral triangle with sides measuring 6cm? 2. a regular pentagon has sides measuring 3.2 cm. what is its perimeter? 3. a regular decagon has sides of 3.5mm . what is it’s perimeter? 4. a regular octagon has a perimeter of 64cm. what is the length of one of the sides? 5. a regular hexagon has a perimeter of 72mm . what is the length of one of the sides? 6. what is the perimeter of a rhombus with sides measuring 11m?

A+b= 17, ab=70, find the value of |a-b|