For what value of x is ΔABC ~ ΔDEF? ABC and DEF are two triangles. An angle A is degree and angle B is (7x + 10) degree. An angle D is (4x - 6) degree and angle E is 94 degree.

A. 12
B. 25
C. 44
D. 52

Use the function nest to evaluate p(x) = 1 + x + · · · + x50 at x = 1.00001. (use the matlab ones command to save typing.) find the error of the computation by comparing with the equivalent expression q(x) = (x51 − 1)/(x − 1).

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

∆red ≅ ∆ by rule will give brainiest if possible