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6% * 100 000 = 0,06 *100 000 = 6 000 zł
2)
x - długośc jedbego boku
4x - długośc drugiego boku
pole 4x * x = 4x^
4x ^ = 36
x^ = 9
x = 3
boki: 3 i 12
obwód: 2* 3 + 2* 12 = 6 + 24 = 30
3)
obliczam promień kuli
r = 2
obliczam pole
p= 4 pi r ^= 4 pi *4 = 16 pi
wpłacona kwota - 100 000 zł
oprocentowanie - 6%
6%*100 000 = 6/100 *100 000 = 6000 zł << zysk
2.
a - x
b - x/4
P = ab
P = 36
a*b = 36
x*x/4 = 36 |*4
x² = 144
x = √144
x = 12
a - 12
b - 12/4 = 3
Ob = 2a+2b
Ob = 2*12+2*3
Ob = 24+6
Ob = 30
3.
V = 10 2/3π cm³
V = 32/3 π cm³
V = 4/3*π*r³
4/3*π*r³ = 32/3 π |*3
4π*r³ = 32π |:π
4r³ = 32 |:4
r³ = 8
r = ∛8
r = 2 cm
P = 4πr²
P = 4*π*2²
P = 4*π*4
P = 16π cm²