25×(1−0.18)^(4)
=11.30
25*0.01=25(1-0.18)^t
0.25=25(0.82)^t
0.25/25=(0.82)^t
t=log(0.25/25)/log(0.82)
t=log(0.25÷25)÷log(0.82)
t=23.21 hours
Answer:
90 m²
Step-by-step explanation:

10 · 18
180
180 ÷ 2
90
Answer: x^2+4
Step-by-step explanation:
122/11= 11.09 or 11.1 depending on how you like to round numbers