An earthquake measured 4.2 on the richter scale. use the formula r logdetermine approximately how many times stronger the wave amplitude a of theearthquake was than a0

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

Prove the divisibility of the following numbers: 25^9 + 5^7 is divisible by 30.also, read as (25 to the power of 9) + (5 to the power of 7) is divisible by 30. blank x 30what is the blank? ( it should be expressed in exponent form)

The diagram shows corresponding lengths in two similar figures. find the area of the smaller figure. a. 14.4 yd2 b. 24 yd2 c. 26.4 yd2 d. 28