\( R=\log \left(\frac{A}{A_{0}}\right) \) where \( A \) - the measure of the amplitude of the earthquake wave \( A_{0} \) the amplitude of the smallest detectable wave (or standard wave). An earthquake is measured with a wave amplitude 525 times as great as \( A_{0} \). What is the magnitude of this earthquake using the Richter scale, to the nearest tenth? The earthquake registered

Vergelyk die volgende getalpatroon met die oorspronklike getalpatroon wat in VRAAG 3.1 hierbo gegee is: \[ 4 ; 28 ; 70 ; 130 ; \ldots \] 3.2.1 Beskryf, in woorde, hoe hierdie nuwe patroon gevorm is. 3.2.2 Bepaal die waarde van die \( 15^{\text {de }} \) term in hierdie patroon.

Cutting speed, when applied to a grinding wheel, is called surface speed. What is the surface speed in ft/min of a 9-in-diameter grinding wheel revolving at 1,500 rpm? (Surface speed \( = \) circumference in feet \( \times \) rpm.)

Find the domain of the logarithmic function. \( f(x)=\log (2-x) \)

Gegee die funksie \( f(x)=3^{-x} \). 6.1 Gee die vergelyking van \( g \) indien \( g \) die refleksie van \( f \) in die \( y \)-as is en wat 3 eenhede afwaarts geskuif word. B.2 Bereken die \( x \)-afsnit van \( g \).

8. \( [5-68 . c] \quad \) Write the explicit rule and determine the 100 th term for the given sequence. \( \quad 24,19,14, \ldots \)