...interest of money varies as the product of the principal, rate per cent, and time, or I oc PRT. 102. One quantity is said to vary directly as a second, and inversely as a third, when the first cannot be changed, but the second multiplied by the reciprocal of the third, (that is, the...

...time. If the time be doubled, and the principal doubled, the interest will be four times as great. 409. One quantity is said to vary directly as a second, and inversely as a third, when the first is always proportioned to the second divided by the third, so that BBI 'V 410. To understand...

...then BP — ^A, A BP and bp = 2a; therefore — = -j — . or A : a :: BP : bp. a bp (196.) DEF. 4. One quantity is said to vary directly as a second and inversely as a third, when the first cannot be changed in any manner, but the second multiplied by the reciprocal of the third,...

...time. If the time be doubled, and the principal doubled, the interest will be 4 times as great. 409. One quantity is said to vary directly as a second, and inversely as a third, Vhen the first is always proportioned to the second divided by the third, so that BB b A ce -Q, that...

...then BP= 2 A in the first, and bp = 1 « in the second, therefore, - = — , or A:« = Bl> :bp. 4. One quantity is said to vary directly as a second, and inversely as a third, when the lirst cannot be changed in any manner, but the second multiplied by the reciprocal of the third,...

...(Л<х.ВС,} when Л being changed to a, B changes to b, and С to c, so that ЛВС — =— X — abc i. 78. One quantity is said to vary directly as a second, and inversely as a third, when the ratio which any two values of the first bear to each other, is the same as the ratio compounded...

...time. If the time be doubled, and the principal doubled, the interest will be four times as great. 409. One quantity is said to vary directly as a second, and inversely as a third, when the first is always proportioned to the second divided by the third, so that Av>%, that is A:a'.-'*:...

...time. If the time be doubled, and the principal doubled, the interest will be four times as great. 409. One quantity is said to vary directly as a second, and inversely as a third, when the first is always proportioned to the second divided by the third, so that .3 cc—, thatis^:a::^:-....

...changed in the same proportion. Or if A =mBC, where m is constant, A is said to vary jointly as В and C. 418. One quantity is said to vary directly as a second...the second and the reciprocal of the third. Or if A = ~YT , where m is constant, A is said to vary directly о as В and inversely as C. 419. If A œ В...

...changed in the same proportion. 376. One quantity is said to vary directly as a second and inveriely as a. third, when it varies jointly as the second and the reciprocal of the third. Or if A = —jr , where m is constant, A is said to vary directly as B and inversely as C. 377. //"Ax B, and...